cirandas.net

commit 9915febde8791b2528b4a219bc063c7a8e56bae8

Author: Braulio Bhavamitra <braulio@prout.io>

stores_app: fix controller path and add serializers

%!v(PANIC=String method: strings: negative Repeat count)


diff --git a/Gemfile.lock b/Gemfile.lock
index e38ece4cc54f9d3d507bf5cf8d97c2939b22721d..e81cc904f40743b40a09879d65be1c6331d573d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,16 +1,9 @@
 GIT
   remote: git://github.com/coletivoEITA/acts_as_solr_reloaded.git
-  revision: fb797353c7358b6b1b045d866a517409b5b29306
-  ref: fb79735
+  revision: a04ff0c8b48e6c128166bc9e95b9ab1b865f45e8
+  ref: a04ff0c
   specs:
     acts_as_solr_reloaded (1.6.0)
-
-GIT
-  remote: git://github.com/coletivoEITA/i18n-js.git
-  revision: b47088c555fbe057bb70ec871677a9a1848b22e4
-  specs:
-    i18n-js (3.0.0.rc11)
-      i18n (~> 0.6)
 
 PATH
   remote: vendor/contacts
@@ -171,7 +164,7 @@       activerecord (>= 3.2, < 5)
     addressable (2.5.1)
       public_suffix (~> 2.0, >= 2.0.2)
     ansi (1.5.0)
-    api-pagination (4.5.2)
+    api-pagination (4.6.0)
     arel (6.0.4)
     assets_live_compile (0.2.1)
       activesupport (>= 3.1)
@@ -188,15 +181,11 @@     babel-source (5.8.35)
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
       execjs (~> 2.0)
-    better_errors (2.1.1)
-      coderay (>= 1.0.0)
-      erubis (>= 2.6.6)
-      rack (>= 0.9.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    browser (2.3.0)
+    browser (2.4.0)
     builder (3.2.3)
-    capybara (2.13.0)
+    capybara (2.14.0)
       addressable
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
@@ -204,14 +193,14 @@       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
     charlock_holmes (0.7.3)
-    childprocess (0.6.3)
+    childprocess (0.7.0)
       ffi (~> 1.0, >= 1.0.11)
     chronic (0.10.2)
     coderay (1.1.1)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     concurrent-ruby (1.0.5)
-    css_parser (1.4.9)
+    css_parser (1.5.0)
       addressable
     cucumber (1.3.20)
       builder (>= 2.1.2)
@@ -227,8 +216,8 @@       nokogiri (~> 1.5)
       railties (>= 3, < 5.1)
     daemons (1.2.4)
     dalli (2.7.6)
-    database_cleaner (1.5.3)
-    debug_inspector (0.0.2)
+    database_cleaner (1.6.1)
+    debug_inspector (0.0.3)
     delayed_job (4.1.2)
       activesupport (>= 3.0, < 5.1)
     delayed_job_active_record (4.1.1)
@@ -240,7 +229,7 @@     diff-lcs (1.3)
     diffy (3.2.0)
     domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
-    dotenv (2.2.0)
+    dotenv (2.2.1)
     eita-jrails (0.10.1)
       actionpack (>= 3.1.0)
       activesupport (>= 3.0.0)
@@ -250,13 +239,11 @@     exception_notification (4.0.1)
       actionmailer (>= 3.0.4)
       activesupport (>= 3.0.4)
     execjs (2.7.0)
-    faraday (0.11.0)
-      multipart-post (>= 1.2, < 3)
     fast_blank (1.0.0)
     fast_gettext (0.9.2)
     ffi (1.9.18)
     flamegraph (0.9.5)
-    geocoder (1.4.3)
+    geocoder (1.4.4)
     get_process_mem (0.2.1)
     gettext (3.2.2)
       locale (>= 2.0.5)
@@ -264,8 +251,8 @@       text (>= 1.3.0)
     gherkin (2.12.2)
       multi_json (~> 1.3)
     git-version-bump (0.15.1)
-    globalid (0.3.7)
-      activesupport (>= 4.1.0)
+    globalid (0.4.0)
+      activesupport (>= 4.2.0)
     grape (0.19.2)
       activesupport
       builder
@@ -279,41 +266,43 @@       virtus (>= 1.0.0)
     grape-entity (0.4.8)
       activesupport
       multi_json (>= 1.3.2)
-    grape_logging (1.4.0)
+    grape_logging (1.5.0)
       grape
-    haml (4.0.7)
+    haml (5.0.1)
+      temple (>= 0.8.0)
       tilt
     haml2slim (0.4.7)
       haml (>= 3.0)
       nokogiri
       ruby_parser
     hashie (3.5.5)
-    html2haml (2.1.0)
+    html2haml (2.2.0)
       erubis (~> 2.7.0)
-      haml (~> 4.0)
+      haml (>= 4.0, < 6)
       nokogiri (>= 1.6.0)
       ruby_parser (~> 3.5)
     htmlentities (4.3.4)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     i18n (0.8.1)
+    i18n-js (3.0.0)
+      i18n (~> 0.6, >= 0.6.6)
     ice_nine (0.11.2)
     js-routes (1.2.6)
       railties (>= 3.2)
       sprockets-rails
-    json (2.0.4)
-    jwt (1.5.6)
+    json (2.1.0)
     kgio (2.11.0)
     launchy (2.4.3)
       addressable (~> 2.3)
-    libv8 (3.16.14.17)
+    libv8 (3.16.14.19)
     liquid (4.0.0)
     locale (2.1.2)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     magic (0.2.9)
       ffi (>= 0.6.3)
-    mail (2.6.4)
+    mail (2.6.5)
       mime-types (>= 1.16, < 4)
     mailgun_rails (0.9.0)
       actionmailer (>= 3.2.13)
@@ -325,7 +314,7 @@     metaclass (0.0.4)
     method_source (0.8.2)
     mime-types (2.99.3)
     mini_portile2 (2.1.0)
-    minitest (5.10.1)
+    minitest (5.10.2)
     minitest-reporters (1.1.14)
       ansi
       builder
@@ -336,64 +325,37 @@       metaclass (~> 0.0.1)
     multi_json (1.12.1)
     multi_test (0.1.2)
     multi_xml (0.6.0)
-    multipart-post (2.0.0)
     mustermann (1.0.0)
     mustermann-grape (1.0.0)
       mustermann (~> 1.0.0)
     netrc (0.11.0)
-    newrelic_rpm (3.18.1.330)
-    nokogiri (1.6.8.1)
+    newrelic_rpm (4.1.0.333)
+    nokogiri (1.7.2)
       mini_portile2 (~> 2.1.0)
-    oauth (0.5.1)
-    oauth2 (1.3.1)
-      faraday (>= 0.8, < 0.12)
-      jwt (~> 1.0)
-      multi_json (~> 1.3)
-      multi_xml (~> 0.5)
-      rack (>= 1.2, < 3)
-    omniauth (1.6.1)
-      hashie (>= 3.4.6, < 3.6.0)
-      rack (>= 1.6.2, < 3)
-    omniauth-facebook (4.0.0)
-      omniauth-oauth2 (~> 1.2)
-    omniauth-github (1.2.3)
-      omniauth (~> 1.5)
-      omniauth-oauth2 (>= 1.4.0, < 2.0)
-    omniauth-google-oauth2 (0.4.1)
-      jwt (~> 1.5.2)
-      multi_json (~> 1.3)
-      omniauth (>= 1.1.1)
-      omniauth-oauth2 (>= 1.3.1)
-    omniauth-oauth (1.1.0)
-      oauth
-      omniauth (~> 1.0)
-    omniauth-oauth2 (1.4.0)
-      oauth2 (~> 1.0)
-      omniauth (~> 1.2)
-    omniauth-twitter (1.4.0)
-      omniauth-oauth (~> 1.1)
-      rack
     pg (0.20.0)
     pothoven-attachment_fu (3.2.18)
-    power_assert (1.0.1)
-    premailer (1.10.0)
-      css_parser (>= 1.4.9)
+    power_assert (1.0.2)
+    premailer (1.10.4)
+      addressable
+      css_parser (>= 1.4.10)
       htmlentities (>= 4.0.0)
-    premailer-rails (1.9.5)
+    premailer-rails (1.9.6)
       actionmailer (>= 3, < 6)
       premailer (~> 1.7, >= 1.7.9)
-    protected_attributes (1.1.3)
+    protected_attributes (1.1.4)
       activemodel (>= 4.0.1, < 5.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    pry-rails (0.3.6)
+      pry (>= 0.10.4)
     public_suffix (2.0.5)
     puma (3.8.2)
-    puma_worker_killer (0.0.7)
+    puma_worker_killer (0.1.0)
       get_process_mem (~> 0.2)
       puma (>= 2.7, < 4)
-    rack (1.6.5)
+    rack (1.6.8)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-contrib (1.4.0)
@@ -402,6 +364,7 @@       rack (~> 1.4)
     rack-cors (0.4.1)
     rack-test (0.6.3)
       rack (>= 1.0)
+    rack-timeout (0.4.2)
     rails (4.2.8)
       actionmailer (= 4.2.8)
       actionpack (= 4.2.8)
@@ -437,17 +400,17 @@     redis-actionpack (5.0.1)
       actionpack (>= 4.0, < 6)
       redis-rack (>= 1, < 3)
       redis-store (>= 1.1.0, < 1.4.0)
-    redis-activesupport (5.0.1)
+    redis-activesupport (5.0.2)
       activesupport (>= 3, < 6)
-      redis-store (~> 1.2.0)
-    redis-rack (1.6.0)
-      rack (~> 1.5)
-      redis-store (~> 1.2.0)
-    redis-rails (5.0.1)
-      redis-actionpack (~> 5.0.0)
-      redis-activesupport (~> 5.0.0)
-      redis-store (~> 1.2.0)
-    redis-store (1.2.0)
+      redis-store (~> 1.3.0)
+    redis-rack (2.0.2)
+      rack (>= 1.5, < 3)
+      redis-store (>= 1.2, < 1.4)
+    redis-rails (5.0.2)
+      redis-actionpack (>= 5.0, < 6)
+      redis-activesupport (>= 5.0, < 6)
+      redis-store (>= 1.2, < 2)
+    redis-store (1.3.0)
       redis (>= 2.2)
     ref (2.0.0)
     rest-client (1.8.0)
@@ -458,36 +421,36 @@     riot_js-rails (0.7.1)
       execjs (~> 2)
       rails (>= 3.0, < 6.0)
     rmagick (2.16.0)
-    rollbar (2.14.0)
+    rollbar (2.14.1)
       multi_json
-    rspec (3.5.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-    rspec-core (3.5.4)
-      rspec-support (~> 3.5.0)
-    rspec-expectations (3.5.0)
+    rspec (3.6.0)
+      rspec-core (~> 3.6.0)
+      rspec-expectations (~> 3.6.0)
+      rspec-mocks (~> 3.6.0)
+    rspec-core (3.6.0)
+      rspec-support (~> 3.6.0)
+    rspec-expectations (3.6.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-mocks (3.5.0)
+      rspec-support (~> 3.6.0)
+    rspec-mocks (3.6.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-rails (3.5.2)
+      rspec-support (~> 3.6.0)
+    rspec-rails (3.6.0)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-      rspec-support (~> 3.5.0)
-    rspec-support (3.5.0)
+      rspec-core (~> 3.6.0)
+      rspec-expectations (~> 3.6.0)
+      rspec-mocks (~> 3.6.0)
+      rspec-support (~> 3.6.0)
+    rspec-support (3.6.0)
     ruby-feedparser (0.9.4)
       magic
     ruby-progressbar (1.8.1)
-    ruby_parser (3.8.4)
+    ruby_parser (3.9.0)
       sexp_processor (~> 4.1)
     rubyzip (1.0.0)
-    sass (3.4.23)
+    sass (3.4.24)
     sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
       sass (~> 3.1)
@@ -498,9 +461,9 @@     selenium-webdriver (2.53.4)
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
       websocket (~> 1.0)
-    sexp_processor (4.8.0)
-    slim (3.0.7)
-      temple (~> 0.7.6)
+    sexp_processor (4.9.0)
+    slim (3.0.8)
+      temple (>= 0.7.6, < 0.9)
       tilt (>= 1.3.3, < 2.1)
     slop (3.6.0)
     spring (2.0.1)
@@ -517,7 +480,7 @@       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     stackprof (0.2.10)
-    temple (0.7.7)
+    temple (0.8.0)
     test-unit (3.2.3)
       power_assert
     text (1.3.1)
@@ -533,8 +496,8 @@     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.3)
-    unicode (0.4.4.2)
+    unf_ext (0.0.7.4)
+    unicode (0.4.4.4)
     unicorn (4.9.0)
       kgio (~> 2.6)
       rack
@@ -579,7 +542,6 @@   acts_as_versioned (> 0.0.0)!
   api-pagination (>= 4.1.1)
   assets_live_compile (>= 0.2.1)
   axlsx
-  better_errors
   binding_of_caller
   browser
   capybara (~> 2.2)
@@ -610,7 +572,7 @@   grape_logging
   haml2slim
   honeypot (= 0.0.0)!
   html2haml
-  i18n-js!
+  i18n-js
   i18n_deprecation (= 0.0.0)!
   js-routes (= 1.2.6)
   kandadaboggu-vote_fu (> 0.0.0)!
@@ -624,21 +586,17 @@   minitest-reporters
   mocha (~> 1.1.0)
   monkey_patches (= 0.0.0)!
   newrelic_rpm
-  nokogiri (~> 1.6.0)
-  omniauth
-  omniauth-facebook
-  omniauth-github
-  omniauth-google-oauth2
-  omniauth-oauth2
-  omniauth-twitter
+  nokogiri (~> 1.7.0)
   pg
   pothoven-attachment_fu (~> 3.2.16)
   premailer-rails
   protected_attributes
   pry
+  pry-rails
   puma_worker_killer
   rack-contrib
   rack-cors
+  rack-timeout
   rails (~> 4.2.7)
   rails-observers
   rails_autolink (~> 1.1.5)
@@ -678,4 +636,4 @@   wirble
   xss_terminate (= 0.0.0)!
 
 BUNDLED WITH
-   1.13.6
+   1.14.6




diff --git a/plugins/stores_app/app/controllers/stores_app/application_controller.rb b/plugins/stores_app/app/controllers/stores_app/application_controller.rb
deleted file mode 100644
index b53e2e3011c244791ba09dc184382d0666e2b2f4..0000000000000000000000000000000000000000
--- a/plugins/stores_app/app/controllers/stores_app/application_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-module StoresAppPlugin
-
-  class ApplicationController < ApplicationController
-
-    layout 'stores_app_plugin/layout'
-
-    needs_profile
-
-    def index
-      render action: :index
-    end
-
-    protected
-
-  end
-end




diff --git a/plugins/stores_app/app/controllers/stores_app_plugin/application_controller.rb b/plugins/stores_app/app/controllers/stores_app_plugin/application_controller.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b53e2e3011c244791ba09dc184382d0666e2b2f4
--- /dev/null
+++ b/plugins/stores_app/app/controllers/stores_app_plugin/application_controller.rb
@@ -0,0 +1,16 @@
+module StoresAppPlugin
+
+  class ApplicationController < ApplicationController
+
+    layout 'stores_app_plugin/layout'
+
+    needs_profile
+
+    def index
+      render action: :index
+    end
+
+    protected
+
+  end
+end




diff --git a/plugins/stores_app/app/serializers/stores_app_plugin/catalog_serializer.rb b/plugins/stores_app/app/serializers/stores_app_plugin/catalog_serializer.rb
new file mode 100644
index 0000000000000000000000000000000000000000..8417da256cc5496b2aa62a34f5990da121938fbe
--- /dev/null
+++ b/plugins/stores_app/app/serializers/stores_app_plugin/catalog_serializer.rb
@@ -0,0 +1,11 @@
+class StoresAppPlugin::CatalogSerializer < ApplicationSerializer
+
+  alias_method :profile, :object
+
+  has_many :products, serializer: ProductSerializer
+
+  def products
+    profile.distributed_products.unarchived.available
+  end
+
+end




diff --git a/plugins/stores_app/app/serializers/stores_app_plugin/product_serializer.rb b/plugins/stores_app/app/serializers/stores_app_plugin/product_serializer.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b70e6001d5e6e982e2f7b42285a08b94ef5c7979
--- /dev/null
+++ b/plugins/stores_app/app/serializers/stores_app_plugin/product_serializer.rb
@@ -0,0 +1,17 @@
+class StoresAppPlugin::ProductSerializer < ApplicationSerializer
+
+  alias_method :product, :object
+
+  attribute :available
+  attribute :highlighted
+
+  attribute :category
+  #has_many :qualifiers
+
+  attribute :name
+
+  def category
+    product.product_category&.name
+  end
+
+end




diff --git a/plugins/stores_app/public/javascripts/stores_app_plugin/vendor/lodash.js b/plugins/stores_app/public/javascripts/stores_app_plugin/vendor/lodash.js
new file mode 100644
index 0000000000000000000000000000000000000000..88c263f86d8aa5d7d27e6b456e03d843a8fd1e7a
--- /dev/null
+++ b/plugins/stores_app/public/javascripts/stores_app_plugin/vendor/lodash.js
@@ -0,0 +1,3836 @@
+/**
+ * @license
+ * Lodash (Custom Build) <https://lodash.com/>
+ * Build: `lodash core -o ./dist/lodash.core.js`
+ * Copyright JS Foundation and other contributors <https://js.foundation/>
+ * Released under MIT license <https://lodash.com/license>
+ * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ */
+;(function() {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** Used as the semantic version number. */
+  var VERSION = '4.17.4';
+
+  /** Error message constants. */
+  var FUNC_ERROR_TEXT = 'Expected a function';
+
+  /** Used to compose bitmasks for value comparisons. */
+  var COMPARE_PARTIAL_FLAG = 1,
+      COMPARE_UNORDERED_FLAG = 2;
+
+  /** Used to compose bitmasks for function metadata. */
+  var WRAP_BIND_FLAG = 1,
+      WRAP_PARTIAL_FLAG = 32;
+
+  /** Used as references for various `Number` constants. */
+  var INFINITY = 1 / 0,
+      MAX_SAFE_INTEGER = 9007199254740991;
+
+  /** `Object#toString` result references. */
+  var argsTag = '[object Arguments]',
+      arrayTag = '[object Array]',
+      asyncTag = '[object AsyncFunction]',
+      boolTag = '[object Boolean]',
+      dateTag = '[object Date]',
+      errorTag = '[object Error]',
+      funcTag = '[object Function]',
+      genTag = '[object GeneratorFunction]',
+      numberTag = '[object Number]',
+      objectTag = '[object Object]',
+      proxyTag = '[object Proxy]',
+      regexpTag = '[object RegExp]',
+      stringTag = '[object String]';
+
+  /** Used to match HTML entities and HTML characters. */
+  var reUnescapedHtml = /[&<>"']/g,
+      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+
+  /** Used to map characters to HTML entities. */
+  var htmlEscapes = {
+    '&': '&amp;',
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    "'": '&#39;'
+  };
+
+  /** Detect free variable `global` from Node.js. */
+  var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+  /** Detect free variable `self`. */
+  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+  /** Used as a reference to the global object. */
+  var root = freeGlobal || freeSelf || Function('return this')();
+
+  /** Detect free variable `exports`. */
+  var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
+
+  /** Detect free variable `module`. */
+  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
+
+  /*--------------------------------------------------------------------------*/
+
+  /**
+   * Appends the elements of `values` to `array`.
+   *
+   * @private
+   * @param {Array} array The array to modify.
+   * @param {Array} values The values to append.
+   * @returns {Array} Returns `array`.
+   */
+  function arrayPush(array, values) {
+    array.push.apply(array, values);
+    return array;
+  }
+
+  /**
+   * The base implementation of `_.findIndex` and `_.findLastIndex` without
+   * support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {Function} predicate The function invoked per iteration.
+   * @param {number} fromIndex The index to search from.
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function baseFindIndex(array, predicate, fromIndex, fromRight) {
+    var length = array.length,
+        index = fromIndex + (fromRight ? 1 : -1);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (predicate(array[index], index, array)) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * The base implementation of `_.property` without support for deep paths.
+   *
+   * @private
+   * @param {string} key The key of the property to get.
+   * @returns {Function} Returns the new accessor function.
+   */
+  function baseProperty(key) {
+    return function(object) {
+      return object == null ? undefined : object[key];
+    };
+  }
+
+  /**
+   * The base implementation of `_.propertyOf` without support for deep paths.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @returns {Function} Returns the new accessor function.
+   */
+  function basePropertyOf(object) {
+    return function(key) {
+      return object == null ? undefined : object[key];
+    };
+  }
+
+  /**
+   * The base implementation of `_.reduce` and `_.reduceRight`, without support
+   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @param {*} accumulator The initial value.
+   * @param {boolean} initAccum Specify using the first or last element of
+   *  `collection` as the initial value.
+   * @param {Function} eachFunc The function to iterate over `collection`.
+   * @returns {*} Returns the accumulated value.
+   */
+  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+    eachFunc(collection, function(value, index, collection) {
+      accumulator = initAccum
+        ? (initAccum = false, value)
+        : iteratee(accumulator, value, index, collection);
+    });
+    return accumulator;
+  }
+
+  /**
+   * The base implementation of `_.values` and `_.valuesIn` which creates an
+   * array of `object` property values corresponding to the property names
+   * of `props`.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @param {Array} props The property names to get values for.
+   * @returns {Object} Returns the array of property values.
+   */
+  function baseValues(object, props) {
+    return baseMap(props, function(key) {
+      return object[key];
+    });
+  }
+
+  /**
+   * Used by `_.escape` to convert characters to HTML entities.
+   *
+   * @private
+   * @param {string} chr The matched character to escape.
+   * @returns {string} Returns the escaped character.
+   */
+  var escapeHtmlChar = basePropertyOf(htmlEscapes);
+
+  /**
+   * Creates a unary function that invokes `func` with its argument transformed.
+   *
+   * @private
+   * @param {Function} func The function to wrap.
+   * @param {Function} transform The argument transform.
+   * @returns {Function} Returns the new function.
+   */
+  function overArg(func, transform) {
+    return function(arg) {
+      return func(transform(arg));
+    };
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  /** Used for built-in method references. */
+  var arrayProto = Array.prototype,
+      objectProto = Object.prototype;
+
+  /** Used to check objects for own properties. */
+  var hasOwnProperty = objectProto.hasOwnProperty;
+
+  /** Used to generate unique IDs. */
+  var idCounter = 0;
+
+  /**
+   * Used to resolve the
+   * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+   * of values.
+   */
+  var nativeObjectToString = objectProto.toString;
+
+  /** Used to restore the original `_` reference in `_.noConflict`. */
+  var oldDash = root._;
+
+  /** Built-in value references. */
+  var objectCreate = Object.create,
+      propertyIsEnumerable = objectProto.propertyIsEnumerable;
+
+  /* Built-in method references for those with the same name as other `lodash` methods. */
+  var nativeIsFinite = root.isFinite,
+      nativeKeys = overArg(Object.keys, Object),
+      nativeMax = Math.max;
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates a `lodash` object which wraps `value` to enable implicit method
+   * chain sequences. Methods that operate on and return arrays, collections,
+   * and functions can be chained together. Methods that retrieve a single value
+   * or may return a primitive value will automatically end the chain sequence
+   * and return the unwrapped value. Otherwise, the value must be unwrapped
+   * with `_#value`.
+   *
+   * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+   * enabled using `_.chain`.
+   *
+   * The execution of chained methods is lazy, that is, it's deferred until
+   * `_#value` is implicitly or explicitly called.
+   *
+   * Lazy evaluation allows several methods to support shortcut fusion.
+   * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+   * the creation of intermediate arrays and can greatly reduce the number of
+   * iteratee executions. Sections of a chain sequence qualify for shortcut
+   * fusion if the section is applied to an array and iteratees accept only
+   * one argument. The heuristic for whether a section qualifies for shortcut
+   * fusion is subject to change.
+   *
+   * Chaining is supported in custom builds as long as the `_#value` method is
+   * directly or indirectly included in the build.
+   *
+   * In addition to lodash methods, wrappers have `Array` and `String` methods.
+   *
+   * The wrapper `Array` methods are:
+   * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+   *
+   * The wrapper `String` methods are:
+   * `replace` and `split`
+   *
+   * The wrapper methods that support shortcut fusion are:
+   * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+   * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+   * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+   *
+   * The chainable wrapper methods are:
+   * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+   * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+   * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+   * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+   * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+   * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+   * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+   * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+   * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+   * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+   * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+   * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+   * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+   * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+   * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+   * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+   * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+   * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+   * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+   * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+   * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+   * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+   * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+   * `zipObject`, `zipObjectDeep`, and `zipWith`
+   *
+   * The wrapper methods that are **not** chainable by default are:
+   * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+   * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+   * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+   * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+   * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+   * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+   * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+   * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+   * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+   * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+   * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+   * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+   * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+   * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+   * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+   * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+   * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+   * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+   * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+   * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+   * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+   * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+   * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+   * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+   * `upperFirst`, `value`, and `words`
+   *
+   * @name _
+   * @constructor
+   * @category Seq
+   * @param {*} value The value to wrap in a `lodash` instance.
+   * @returns {Object} Returns the new `lodash` wrapper instance.
+   * @example
+   *
+   * function square(n) {
+   *   return n * n;
+   * }
+   *
+   * var wrapped = _([1, 2, 3]);
+   *
+   * // Returns an unwrapped value.
+   * wrapped.reduce(_.add);
+   * // => 6
+   *
+   * // Returns a wrapped value.
+   * var squares = wrapped.map(square);
+   *
+   * _.isArray(squares);
+   * // => false
+   *
+   * _.isArray(squares.value());
+   * // => true
+   */
+  function lodash(value) {
+    return value instanceof LodashWrapper
+      ? value
+      : new LodashWrapper(value);
+  }
+
+  /**
+   * The base implementation of `_.create` without support for assigning
+   * properties to the created object.
+   *
+   * @private
+   * @param {Object} proto The object to inherit from.
+   * @returns {Object} Returns the new object.
+   */
+  var baseCreate = (function() {
+    function object() {}
+    return function(proto) {
+      if (!isObject(proto)) {
+        return {};
+      }
+      if (objectCreate) {
+        return objectCreate(proto);
+      }
+      object.prototype = proto;
+      var result = new object;
+      object.prototype = undefined;
+      return result;
+    };
+  }());
+
+  /**
+   * The base constructor for creating `lodash` wrapper objects.
+   *
+   * @private
+   * @param {*} value The value to wrap.
+   * @param {boolean} [chainAll] Enable explicit method chain sequences.
+   */
+  function LodashWrapper(value, chainAll) {
+    this.__wrapped__ = value;
+    this.__actions__ = [];
+    this.__chain__ = !!chainAll;
+  }
+
+  LodashWrapper.prototype = baseCreate(lodash.prototype);
+  LodashWrapper.prototype.constructor = LodashWrapper;
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Assigns `value` to `key` of `object` if the existing value is not equivalent
+   * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+   * for equality comparisons.
+   *
+   * @private
+   * @param {Object} object The object to modify.
+   * @param {string} key The key of the property to assign.
+   * @param {*} value The value to assign.
+   */
+  function assignValue(object, key, value) {
+    var objValue = object[key];
+    if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
+        (value === undefined && !(key in object))) {
+      baseAssignValue(object, key, value);
+    }
+  }
+
+  /**
+   * The base implementation of `assignValue` and `assignMergeValue` without
+   * value checks.
+   *
+   * @private
+   * @param {Object} object The object to modify.
+   * @param {string} key The key of the property to assign.
+   * @param {*} value The value to assign.
+   */
+  function baseAssignValue(object, key, value) {
+    object[key] = value;
+  }
+
+  /**
+   * The base implementation of `_.delay` and `_.defer` which accepts `args`
+   * to provide to `func`.
+   *
+   * @private
+   * @param {Function} func The function to delay.
+   * @param {number} wait The number of milliseconds to delay invocation.
+   * @param {Array} args The arguments to provide to `func`.
+   * @returns {number|Object} Returns the timer id or timeout object.
+   */
+  function baseDelay(func, wait, args) {
+    if (typeof func != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    return setTimeout(function() { func.apply(undefined, args); }, wait);
+  }
+
+  /**
+   * The base implementation of `_.forEach` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array|Object} Returns `collection`.
+   */
+  var baseEach = createBaseEach(baseForOwn);
+
+  /**
+   * The base implementation of `_.every` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {boolean} Returns `true` if all elements pass the predicate check,
+   *  else `false`
+   */
+  function baseEvery(collection, predicate) {
+    var result = true;
+    baseEach(collection, function(value, index, collection) {
+      result = !!predicate(value, index, collection);
+      return result;
+    });
+    return result;
+  }
+
+  /**
+   * The base implementation of methods like `_.max` and `_.min` which accepts a
+   * `comparator` to determine the extremum value.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The iteratee invoked per iteration.
+   * @param {Function} comparator The comparator used to compare values.
+   * @returns {*} Returns the extremum value.
+   */
+  function baseExtremum(array, iteratee, comparator) {
+    var index = -1,
+        length = array.length;
+
+    while (++index < length) {
+      var value = array[index],
+          current = iteratee(value);
+
+      if (current != null && (computed === undefined
+            ? (current === current && !false)
+            : comparator(current, computed)
+          )) {
+        var computed = current,
+            result = value;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.filter` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {Array} Returns the new filtered array.
+   */
+  function baseFilter(collection, predicate) {
+    var result = [];
+    baseEach(collection, function(value, index, collection) {
+      if (predicate(value, index, collection)) {
+        result.push(value);
+      }
+    });
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.flatten` with support for restricting flattening.
+   *
+   * @private
+   * @param {Array} array The array to flatten.
+   * @param {number} depth The maximum recursion depth.
+   * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+   * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+   * @param {Array} [result=[]] The initial result value.
+   * @returns {Array} Returns the new flattened array.
+   */
+  function baseFlatten(array, depth, predicate, isStrict, result) {
+    var index = -1,
+        length = array.length;
+
+    predicate || (predicate = isFlattenable);
+    result || (result = []);
+
+    while (++index < length) {
+      var value = array[index];
+      if (depth > 0 && predicate(value)) {
+        if (depth > 1) {
+          // Recursively flatten arrays (susceptible to call stack limits).
+          baseFlatten(value, depth - 1, predicate, isStrict, result);
+        } else {
+          arrayPush(result, value);
+        }
+      } else if (!isStrict) {
+        result[result.length] = value;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * The base implementation of `baseForOwn` which iterates over `object`
+   * properties returned by `keysFunc` and invokes `iteratee` for each property.
+   * Iteratee functions may exit iteration early by explicitly returning `false`.
+   *
+   * @private
+   * @param {Object} object The object to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @param {Function} keysFunc The function to get the keys of `object`.
+   * @returns {Object} Returns `object`.
+   */
+  var baseFor = createBaseFor();
+
+  /**
+   * The base implementation of `_.forOwn` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Object} object The object to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Object} Returns `object`.
+   */
+  function baseForOwn(object, iteratee) {
+    return object && baseFor(object, iteratee, keys);
+  }
+
+  /**
+   * The base implementation of `_.functions` which creates an array of
+   * `object` function property names filtered from `props`.
+   *
+   * @private
+   * @param {Object} object The object to inspect.
+   * @param {Array} props The property names to filter.
+   * @returns {Array} Returns the function names.
+   */
+  function baseFunctions(object, props) {
+    return baseFilter(props, function(key) {
+      return isFunction(object[key]);
+    });
+  }
+
+  /**
+   * The base implementation of `getTag` without fallbacks for buggy environments.
+   *
+   * @private
+   * @param {*} value The value to query.
+   * @returns {string} Returns the `toStringTag`.
+   */
+  function baseGetTag(value) {
+    return objectToString(value);
+  }
+
+  /**
+   * The base implementation of `_.gt` which doesn't coerce arguments.
+   *
+   * @private
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @returns {boolean} Returns `true` if `value` is greater than `other`,
+   *  else `false`.
+   */
+  function baseGt(value, other) {
+    return value > other;
+  }
+
+  /**
+   * The base implementation of `_.isArguments`.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+   */
+  var baseIsArguments = noop;
+
+  /**
+   * The base implementation of `_.isDate` without Node.js optimizations.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+   */
+  function baseIsDate(value) {
+    return isObjectLike(value) && baseGetTag(value) == dateTag;
+  }
+
+  /**
+   * The base implementation of `_.isEqual` which supports partial comparisons
+   * and tracks traversed objects.
+   *
+   * @private
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @param {boolean} bitmask The bitmask flags.
+   *  1 - Unordered comparison
+   *  2 - Partial comparison
+   * @param {Function} [customizer] The function to customize comparisons.
+   * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+   */
+  function baseIsEqual(value, other, bitmask, customizer, stack) {
+    if (value === other) {
+      return true;
+    }
+    if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
+      return value !== value && other !== other;
+    }
+    return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
+  }
+
+  /**
+   * A specialized version of `baseIsEqual` for arrays and objects which performs
+   * deep comparisons and tracks traversed objects enabling objects with circular
+   * references to be compared.
+   *
+   * @private
+   * @param {Object} object The object to compare.
+   * @param {Object} other The other object to compare.
+   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+   * @param {Function} customizer The function to customize comparisons.
+   * @param {Function} equalFunc The function to determine equivalents of values.
+   * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+   */
+  function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+    var objIsArr = isArray(object),
+        othIsArr = isArray(other),
+        objTag = objIsArr ? arrayTag : baseGetTag(object),
+        othTag = othIsArr ? arrayTag : baseGetTag(other);
+
+    objTag = objTag == argsTag ? objectTag : objTag;
+    othTag = othTag == argsTag ? objectTag : othTag;
+
+    var objIsObj = objTag == objectTag,
+        othIsObj = othTag == objectTag,
+        isSameTag = objTag == othTag;
+
+    stack || (stack = []);
+    var objStack = find(stack, function(entry) {
+      return entry[0] == object;
+    });
+    var othStack = find(stack, function(entry) {
+      return entry[0] == other;
+    });
+    if (objStack && othStack) {
+      return objStack[1] == other;
+    }
+    stack.push([object, other]);
+    stack.push([other, object]);
+    if (isSameTag && !objIsObj) {
+      var result = (objIsArr)
+        ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
+        : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+      stack.pop();
+      return result;
+    }
+    if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+      var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+          othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+      if (objIsWrapped || othIsWrapped) {
+        var objUnwrapped = objIsWrapped ? object.value() : object,
+            othUnwrapped = othIsWrapped ? other.value() : other;
+
+        var result = equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+        stack.pop();
+        return result;
+      }
+    }
+    if (!isSameTag) {
+      return false;
+    }
+    var result = equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+    stack.pop();
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.isRegExp` without Node.js optimizations.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+   */
+  function baseIsRegExp(value) {
+    return isObjectLike(value) && baseGetTag(value) == regexpTag;
+  }
+
+  /**
+   * The base implementation of `_.iteratee`.
+   *
+   * @private
+   * @param {*} [value=_.identity] The value to convert to an iteratee.
+   * @returns {Function} Returns the iteratee.
+   */
+  function baseIteratee(func) {
+    if (typeof func == 'function') {
+      return func;
+    }
+    if (func == null) {
+      return identity;
+    }
+    return (typeof func == 'object' ? baseMatches : baseProperty)(func);
+  }
+
+  /**
+   * The base implementation of `_.lt` which doesn't coerce arguments.
+   *
+   * @private
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @returns {boolean} Returns `true` if `value` is less than `other`,
+   *  else `false`.
+   */
+  function baseLt(value, other) {
+    return value < other;
+  }
+
+  /**
+   * The base implementation of `_.map` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   */
+  function baseMap(collection, iteratee) {
+    var index = -1,
+        result = isArrayLike(collection) ? Array(collection.length) : [];
+
+    baseEach(collection, function(value, key, collection) {
+      result[++index] = iteratee(value, key, collection);
+    });
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.matches` which doesn't clone `source`.
+   *
+   * @private
+   * @param {Object} source The object of property values to match.
+   * @returns {Function} Returns the new spec function.
+   */
+  function baseMatches(source) {
+    var props = nativeKeys(source);
+    return function(object) {
+      var length = props.length;
+      if (object == null) {
+        return !length;
+      }
+      object = Object(object);
+      while (length--) {
+        var key = props[length];
+        if (!(key in object &&
+              baseIsEqual(source[key], object[key], COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG)
+            )) {
+          return false;
+        }
+      }
+      return true;
+    };
+  }
+
+  /**
+   * The base implementation of `_.pick` without support for individual
+   * property identifiers.
+   *
+   * @private
+   * @param {Object} object The source object.
+   * @param {string[]} paths The property paths to pick.
+   * @returns {Object} Returns the new object.
+   */
+  function basePick(object, props) {
+    object = Object(object);
+    return reduce(props, function(result, key) {
+      if (key in object) {
+        result[key] = object[key];
+      }
+      return result;
+    }, {});
+  }
+
+  /**
+   * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+   *
+   * @private
+   * @param {Function} func The function to apply a rest parameter to.
+   * @param {number} [start=func.length-1] The start position of the rest parameter.
+   * @returns {Function} Returns the new function.
+   */
+  function baseRest(func, start) {
+    return setToString(overRest(func, start, identity), func + '');
+  }
+
+  /**
+   * The base implementation of `_.slice` without an iteratee call guard.
+   *
+   * @private
+   * @param {Array} array The array to slice.
+   * @param {number} [start=0] The start position.
+   * @param {number} [end=array.length] The end position.
+   * @returns {Array} Returns the slice of `array`.
+   */
+  function baseSlice(array, start, end) {
+    var index = -1,
+        length = array.length;
+
+    if (start < 0) {
+      start = -start > length ? 0 : (length + start);
+    }
+    end = end > length ? length : end;
+    if (end < 0) {
+      end += length;
+    }
+    length = start > end ? 0 : ((end - start) >>> 0);
+    start >>>= 0;
+
+    var result = Array(length);
+    while (++index < length) {
+      result[index] = array[index + start];
+    }
+    return result;
+  }
+
+  /**
+   * Copies the values of `source` to `array`.
+   *
+   * @private
+   * @param {Array} source The array to copy values from.
+   * @param {Array} [array=[]] The array to copy values to.
+   * @returns {Array} Returns `array`.
+   */
+  function copyArray(source) {
+    return baseSlice(source, 0, source.length);
+  }
+
+  /**
+   * The base implementation of `_.some` without support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {boolean} Returns `true` if any element passes the predicate check,
+   *  else `false`.
+   */
+  function baseSome(collection, predicate) {
+    var result;
+
+    baseEach(collection, function(value, index, collection) {
+      result = predicate(value, index, collection);
+      return !result;
+    });
+    return !!result;
+  }
+
+  /**
+   * The base implementation of `wrapperValue` which returns the result of
+   * performing a sequence of actions on the unwrapped `value`, where each
+   * successive action is supplied the return value of the previous.
+   *
+   * @private
+   * @param {*} value The unwrapped value.
+   * @param {Array} actions Actions to perform to resolve the unwrapped value.
+   * @returns {*} Returns the resolved value.
+   */
+  function baseWrapperValue(value, actions) {
+    var result = value;
+    return reduce(actions, function(result, action) {
+      return action.func.apply(action.thisArg, arrayPush([result], action.args));
+    }, result);
+  }
+
+  /**
+   * Compares values to sort them in ascending order.
+   *
+   * @private
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @returns {number} Returns the sort order indicator for `value`.
+   */
+  function compareAscending(value, other) {
+    if (value !== other) {
+      var valIsDefined = value !== undefined,
+          valIsNull = value === null,
+          valIsReflexive = value === value,
+          valIsSymbol = false;
+
+      var othIsDefined = other !== undefined,
+          othIsNull = other === null,
+          othIsReflexive = other === other,
+          othIsSymbol = false;
+
+      if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
+          (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
+          (valIsNull && othIsDefined && othIsReflexive) ||
+          (!valIsDefined && othIsReflexive) ||
+          !valIsReflexive) {
+        return 1;
+      }
+      if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
+          (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
+          (othIsNull && valIsDefined && valIsReflexive) ||
+          (!othIsDefined && valIsReflexive) ||
+          !othIsReflexive) {
+        return -1;
+      }
+    }
+    return 0;
+  }
+
+  /**
+   * Copies properties of `source` to `object`.
+   *
+   * @private
+   * @param {Object} source The object to copy properties from.
+   * @param {Array} props The property identifiers to copy.
+   * @param {Object} [object={}] The object to copy properties to.
+   * @param {Function} [customizer] The function to customize copied values.
+   * @returns {Object} Returns `object`.
+   */
+  function copyObject(source, props, object, customizer) {
+    var isNew = !object;
+    object || (object = {});
+
+    var index = -1,
+        length = props.length;
+
+    while (++index < length) {
+      var key = props[index];
+
+      var newValue = customizer
+        ? customizer(object[key], source[key], key, object, source)
+        : undefined;
+
+      if (newValue === undefined) {
+        newValue = source[key];
+      }
+      if (isNew) {
+        baseAssignValue(object, key, newValue);
+      } else {
+        assignValue(object, key, newValue);
+      }
+    }
+    return object;
+  }
+
+  /**
+   * Creates a function like `_.assign`.
+   *
+   * @private
+   * @param {Function} assigner The function to assign values.
+   * @returns {Function} Returns the new assigner function.
+   */
+  function createAssigner(assigner) {
+    return baseRest(function(object, sources) {
+      var index = -1,
+          length = sources.length,
+          customizer = length > 1 ? sources[length - 1] : undefined;
+
+      customizer = (assigner.length > 3 && typeof customizer == 'function')
+        ? (length--, customizer)
+        : undefined;
+
+      object = Object(object);
+      while (++index < length) {
+        var source = sources[index];
+        if (source) {
+          assigner(object, source, index, customizer);
+        }
+      }
+      return object;
+    });
+  }
+
+  /**
+   * Creates a `baseEach` or `baseEachRight` function.
+   *
+   * @private
+   * @param {Function} eachFunc The function to iterate over a collection.
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {Function} Returns the new base function.
+   */
+  function createBaseEach(eachFunc, fromRight) {
+    return function(collection, iteratee) {
+      if (collection == null) {
+        return collection;
+      }
+      if (!isArrayLike(collection)) {
+        return eachFunc(collection, iteratee);
+      }
+      var length = collection.length,
+          index = fromRight ? length : -1,
+          iterable = Object(collection);
+
+      while ((fromRight ? index-- : ++index < length)) {
+        if (iteratee(iterable[index], index, iterable) === false) {
+          break;
+        }
+      }
+      return collection;
+    };
+  }
+
+  /**
+   * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+   *
+   * @private
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {Function} Returns the new base function.
+   */
+  function createBaseFor(fromRight) {
+    return function(object, iteratee, keysFunc) {
+      var index = -1,
+          iterable = Object(object),
+          props = keysFunc(object),
+          length = props.length;
+
+      while (length--) {
+        var key = props[fromRight ? length : ++index];
+        if (iteratee(iterable[key], key, iterable) === false) {
+          break;
+        }
+      }
+      return object;
+    };
+  }
+
+  /**
+   * Creates a function that produces an instance of `Ctor` regardless of
+   * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+   *
+   * @private
+   * @param {Function} Ctor The constructor to wrap.
+   * @returns {Function} Returns the new wrapped function.
+   */
+  function createCtor(Ctor) {
+    return function() {
+      // Use a `switch` statement to work with class constructors. See
+      // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+      // for more details.
+      var args = arguments;
+      var thisBinding = baseCreate(Ctor.prototype),
+          result = Ctor.apply(thisBinding, args);
+
+      // Mimic the constructor's `return` behavior.
+      // See https://es5.github.io/#x13.2.2 for more details.
+      return isObject(result) ? result : thisBinding;
+    };
+  }
+
+  /**
+   * Creates a `_.find` or `_.findLast` function.
+   *
+   * @private
+   * @param {Function} findIndexFunc The function to find the collection index.
+   * @returns {Function} Returns the new find function.
+   */
+  function createFind(findIndexFunc) {
+    return function(collection, predicate, fromIndex) {
+      var iterable = Object(collection);
+      if (!isArrayLike(collection)) {
+        var iteratee = baseIteratee(predicate, 3);
+        collection = keys(collection);
+        predicate = function(key) { return iteratee(iterable[key], key, iterable); };
+      }
+      var index = findIndexFunc(collection, predicate, fromIndex);
+      return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
+    };
+  }
+
+  /**
+   * Creates a function that wraps `func` to invoke it with the `this` binding
+   * of `thisArg` and `partials` prepended to the arguments it receives.
+   *
+   * @private
+   * @param {Function} func The function to wrap.
+   * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+   * @param {*} thisArg The `this` binding of `func`.
+   * @param {Array} partials The arguments to prepend to those provided to
+   *  the new function.
+   * @returns {Function} Returns the new wrapped function.
+   */
+  function createPartial(func, bitmask, thisArg, partials) {
+    if (typeof func != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    var isBind = bitmask & WRAP_BIND_FLAG,
+        Ctor = createCtor(func);
+
+    function wrapper() {
+      var argsIndex = -1,
+          argsLength = arguments.length,
+          leftIndex = -1,
+          leftLength = partials.length,
+          args = Array(leftLength + argsLength),
+          fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+
+      while (++leftIndex < leftLength) {
+        args[leftIndex] = partials[leftIndex];
+      }
+      while (argsLength--) {
+        args[leftIndex++] = arguments[++argsIndex];
+      }
+      return fn.apply(isBind ? thisArg : this, args);
+    }
+    return wrapper;
+  }
+
+  /**
+   * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+   * of source objects to the destination object for all destination properties
+   * that resolve to `undefined`.
+   *
+   * @private
+   * @param {*} objValue The destination value.
+   * @param {*} srcValue The source value.
+   * @param {string} key The key of the property to assign.
+   * @param {Object} object The parent object of `objValue`.
+   * @returns {*} Returns the value to assign.
+   */
+  function customDefaultsAssignIn(objValue, srcValue, key, object) {
+    if (objValue === undefined ||
+        (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+      return srcValue;
+    }
+    return objValue;
+  }
+
+  /**
+   * A specialized version of `baseIsEqualDeep` for arrays with support for
+   * partial deep comparisons.
+   *
+   * @private
+   * @param {Array} array The array to compare.
+   * @param {Array} other The other array to compare.
+   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+   * @param {Function} customizer The function to customize comparisons.
+   * @param {Function} equalFunc The function to determine equivalents of values.
+   * @param {Object} stack Tracks traversed `array` and `other` objects.
+   * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+   */
+  function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+    var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+        arrLength = array.length,
+        othLength = other.length;
+
+    if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+      return false;
+    }
+    var index = -1,
+        result = true,
+        seen = (bitmask & COMPARE_UNORDERED_FLAG) ? [] : undefined;
+
+    // Ignore non-index properties.
+    while (++index < arrLength) {
+      var arrValue = array[index],
+          othValue = other[index];
+
+      var compared;
+      if (compared !== undefined) {
+        if (compared) {
+          continue;
+        }
+        result = false;
+        break;
+      }
+      // Recursively compare arrays (susceptible to call stack limits).
+      if (seen) {
+        if (!baseSome(other, function(othValue, othIndex) {
+              if (!indexOf(seen, othIndex) &&
+                  (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+                return seen.push(othIndex);
+              }
+            })) {
+          result = false;
+          break;
+        }
+      } else if (!(
+            arrValue === othValue ||
+              equalFunc(arrValue, othValue, bitmask, customizer, stack)
+          )) {
+        result = false;
+        break;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * A specialized version of `baseIsEqualDeep` for comparing objects of
+   * the same `toStringTag`.
+   *
+   * **Note:** This function only supports comparing values with tags of
+   * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+   *
+   * @private
+   * @param {Object} object The object to compare.
+   * @param {Object} other The other object to compare.
+   * @param {string} tag The `toStringTag` of the objects to compare.
+   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+   * @param {Function} customizer The function to customize comparisons.
+   * @param {Function} equalFunc The function to determine equivalents of values.
+   * @param {Object} stack Tracks traversed `object` and `other` objects.
+   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+   */
+  function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+    switch (tag) {
+
+      case boolTag:
+      case dateTag:
+      case numberTag:
+        // Coerce booleans to `1` or `0` and dates to milliseconds.
+        // Invalid dates are coerced to `NaN`.
+        return eq(+object, +other);
+
+      case errorTag:
+        return object.name == other.name && object.message == other.message;
+
+      case regexpTag:
+      case stringTag:
+        // Coerce regexes to strings and treat strings, primitives and objects,
+        // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+        // for more details.
+        return object == (other + '');
+
+    }
+    return false;
+  }
+
+  /**
+   * A specialized version of `baseIsEqualDeep` for objects with support for
+   * partial deep comparisons.
+   *
+   * @private
+   * @param {Object} object The object to compare.
+   * @param {Object} other The other object to compare.
+   * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+   * @param {Function} customizer The function to customize comparisons.
+   * @param {Function} equalFunc The function to determine equivalents of values.
+   * @param {Object} stack Tracks traversed `object` and `other` objects.
+   * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+   */
+  function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+    var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+        objProps = keys(object),
+        objLength = objProps.length,
+        othProps = keys(other),
+        othLength = othProps.length;
+
+    if (objLength != othLength && !isPartial) {
+      return false;
+    }
+    var index = objLength;
+    while (index--) {
+      var key = objProps[index];
+      if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+        return false;
+      }
+    }
+    var result = true;
+
+    var skipCtor = isPartial;
+    while (++index < objLength) {
+      key = objProps[index];
+      var objValue = object[key],
+          othValue = other[key];
+
+      var compared;
+      // Recursively compare objects (susceptible to call stack limits).
+      if (!(compared === undefined
+            ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
+            : compared
+          )) {
+        result = false;
+        break;
+      }
+      skipCtor || (skipCtor = key == 'constructor');
+    }
+    if (result && !skipCtor) {
+      var objCtor = object.constructor,
+          othCtor = other.constructor;
+
+      // Non `Object` object instances with different constructors are not equal.
+      if (objCtor != othCtor &&
+          ('constructor' in object && 'constructor' in other) &&
+          !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+            typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+        result = false;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * A specialized version of `baseRest` which flattens the rest array.
+   *
+   * @private
+   * @param {Function} func The function to apply a rest parameter to.
+   * @returns {Function} Returns the new function.
+   */
+  function flatRest(func) {
+    return setToString(overRest(func, undefined, flatten), func + '');
+  }
+
+  /**
+   * Checks if `value` is a flattenable `arguments` object or array.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+   */
+  function isFlattenable(value) {
+    return isArray(value) || isArguments(value);
+  }
+
+  /**
+   * This function is like
+   * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+   * except that it includes inherited enumerable properties.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @returns {Array} Returns the array of property names.
+   */
+  function nativeKeysIn(object) {
+    var result = [];
+    if (object != null) {
+      for (var key in Object(object)) {
+        result.push(key);
+      }
+    }
+    return result;
+  }
+
+  /**
+   * Converts `value` to a string using `Object.prototype.toString`.
+   *
+   * @private
+   * @param {*} value The value to convert.
+   * @returns {string} Returns the converted string.
+   */
+  function objectToString(value) {
+    return nativeObjectToString.call(value);
+  }
+
+  /**
+   * A specialized version of `baseRest` which transforms the rest array.
+   *
+   * @private
+   * @param {Function} func The function to apply a rest parameter to.
+   * @param {number} [start=func.length-1] The start position of the rest parameter.
+   * @param {Function} transform The rest array transform.
+   * @returns {Function} Returns the new function.
+   */
+  function overRest(func, start, transform) {
+    start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+    return function() {
+      var args = arguments,
+          index = -1,
+          length = nativeMax(args.length - start, 0),
+          array = Array(length);
+
+      while (++index < length) {
+        array[index] = args[start + index];
+      }
+      index = -1;
+      var otherArgs = Array(start + 1);
+      while (++index < start) {
+        otherArgs[index] = args[index];
+      }
+      otherArgs[start] = transform(array);
+      return func.apply(this, otherArgs);
+    };
+  }
+
+  /**
+   * Sets the `toString` method of `func` to return `string`.
+   *
+   * @private
+   * @param {Function} func The function to modify.
+   * @param {Function} string The `toString` result.
+   * @returns {Function} Returns `func`.
+   */
+  var setToString = identity;
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates an array with all falsey values removed. The values `false`, `null`,
+   * `0`, `""`, `undefined`, and `NaN` are falsey.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Array
+   * @param {Array} array The array to compact.
+   * @returns {Array} Returns the new array of filtered values.
+   * @example
+   *
+   * _.compact([0, 1, false, 2, '', 3]);
+   * // => [1, 2, 3]
+   */
+  function compact(array) {
+    return baseFilter(array, Boolean);
+  }
+
+  /**
+   * Creates a new array concatenating `array` with any additional arrays
+   * and/or values.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Array
+   * @param {Array} array The array to concatenate.
+   * @param {...*} [values] The values to concatenate.
+   * @returns {Array} Returns the new concatenated array.
+   * @example
+   *
+   * var array = [1];
+   * var other = _.concat(array, 2, [3], [[4]]);
+   *
+   * console.log(other);
+   * // => [1, 2, 3, [4]]
+   *
+   * console.log(array);
+   * // => [1]
+   */
+  function concat() {
+    var length = arguments.length;
+    if (!length) {
+      return [];
+    }
+    var args = Array(length - 1),
+        array = arguments[0],
+        index = length;
+
+    while (index--) {
+      args[index - 1] = arguments[index];
+    }
+    return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
+  }
+
+  /**
+   * This method is like `_.find` except that it returns the index of the first
+   * element `predicate` returns truthy for instead of the element itself.
+   *
+   * @static
+   * @memberOf _
+   * @since 1.1.0
+   * @category Array
+   * @param {Array} array The array to inspect.
+   * @param {Function} [predicate=_.identity] The function invoked per iteration.
+   * @param {number} [fromIndex=0] The index to search from.
+   * @returns {number} Returns the index of the found element, else `-1`.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney',  'active': false },
+   *   { 'user': 'fred',    'active': false },
+   *   { 'user': 'pebbles', 'active': true }
+   * ];
+   *
+   * _.findIndex(users, function(o) { return o.user == 'barney'; });
+   * // => 0
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.findIndex(users, { 'user': 'fred', 'active': false });
+   * // => 1
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.findIndex(users, ['active', false]);
+   * // => 0
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.findIndex(users, 'active');
+   * // => 2
+   */
+  function findIndex(array, predicate, fromIndex) {
+    var length = array == null ? 0 : array.length;
+    if (!length) {
+      return -1;
+    }
+    var index = fromIndex == null ? 0 : toInteger(fromIndex);
+    if (index < 0) {
+      index = nativeMax(length + index, 0);
+    }
+    return baseFindIndex(array, baseIteratee(predicate, 3), index);
+  }
+
+  /**
+   * Flattens `array` a single level deep.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Array
+   * @param {Array} array The array to flatten.
+   * @returns {Array} Returns the new flattened array.
+   * @example
+   *
+   * _.flatten([1, [2, [3, [4]], 5]]);
+   * // => [1, 2, [3, [4]], 5]
+   */
+  function flatten(array) {
+    var length = array == null ? 0 : array.length;
+    return length ? baseFlatten(array, 1) : [];
+  }
+
+  /**
+   * Recursively flattens `array`.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Array
+   * @param {Array} array The array to flatten.
+   * @returns {Array} Returns the new flattened array.
+   * @example
+   *
+   * _.flattenDeep([1, [2, [3, [4]], 5]]);
+   * // => [1, 2, 3, 4, 5]
+   */
+  function flattenDeep(array) {
+    var length = array == null ? 0 : array.length;
+    return length ? baseFlatten(array, INFINITY) : [];
+  }
+
+  /**
+   * Gets the first element of `array`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @alias first
+   * @category Array
+   * @param {Array} array The array to query.
+   * @returns {*} Returns the first element of `array`.
+   * @example
+   *
+   * _.head([1, 2, 3]);
+   * // => 1
+   *
+   * _.head([]);
+   * // => undefined
+   */
+  function head(array) {
+    return (array && array.length) ? array[0] : undefined;
+  }
+
+  /**
+   * Gets the index at which the first occurrence of `value` is found in `array`
+   * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+   * for equality comparisons. If `fromIndex` is negative, it's used as the
+   * offset from the end of `array`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Array
+   * @param {Array} array The array to inspect.
+   * @param {*} value The value to search for.
+   * @param {number} [fromIndex=0] The index to search from.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   * @example
+   *
+   * _.indexOf([1, 2, 1, 2], 2);
+   * // => 1
+   *
+   * // Search from the `fromIndex`.
+   * _.indexOf([1, 2, 1, 2], 2, 2);
+   * // => 3
+   */
+  function indexOf(array, value, fromIndex) {
+    var length = array == null ? 0 : array.length;
+    if (typeof fromIndex == 'number') {
+      fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
+    } else {
+      fromIndex = 0;
+    }
+    var index = (fromIndex || 0) - 1,
+        isReflexive = value === value;
+
+    while (++index < length) {
+      var other = array[index];
+      if ((isReflexive ? other === value : other !== other)) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * Gets the last element of `array`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Array
+   * @param {Array} array The array to query.
+   * @returns {*} Returns the last element of `array`.
+   * @example
+   *
+   * _.last([1, 2, 3]);
+   * // => 3
+   */
+  function last(array) {
+    var length = array == null ? 0 : array.length;
+    return length ? array[length - 1] : undefined;
+  }
+
+  /**
+   * Creates a slice of `array` from `start` up to, but not including, `end`.
+   *
+   * **Note:** This method is used instead of
+   * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+   * returned.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Array
+   * @param {Array} array The array to slice.
+   * @param {number} [start=0] The start position.
+   * @param {number} [end=array.length] The end position.
+   * @returns {Array} Returns the slice of `array`.
+   */
+  function slice(array, start, end) {
+    var length = array == null ? 0 : array.length;
+    start = start == null ? 0 : +start;
+    end = end === undefined ? length : +end;
+    return length ? baseSlice(array, start, end) : [];
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+   * chain sequences enabled. The result of such sequences must be unwrapped
+   * with `_#value`.
+   *
+   * @static
+   * @memberOf _
+   * @since 1.3.0
+   * @category Seq
+   * @param {*} value The value to wrap.
+   * @returns {Object} Returns the new `lodash` wrapper instance.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney',  'age': 36 },
+   *   { 'user': 'fred',    'age': 40 },
+   *   { 'user': 'pebbles', 'age': 1 }
+   * ];
+   *
+   * var youngest = _
+   *   .chain(users)
+   *   .sortBy('age')
+   *   .map(function(o) {
+   *     return o.user + ' is ' + o.age;
+   *   })
+   *   .head()
+   *   .value();
+   * // => 'pebbles is 1'
+   */
+  function chain(value) {
+    var result = lodash(value);
+    result.__chain__ = true;
+    return result;
+  }
+
+  /**
+   * This method invokes `interceptor` and returns `value`. The interceptor
+   * is invoked with one argument; (value). The purpose of this method is to
+   * "tap into" a method chain sequence in order to modify intermediate results.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Seq
+   * @param {*} value The value to provide to `interceptor`.
+   * @param {Function} interceptor The function to invoke.
+   * @returns {*} Returns `value`.
+   * @example
+   *
+   * _([1, 2, 3])
+   *  .tap(function(array) {
+   *    // Mutate input array.
+   *    array.pop();
+   *  })
+   *  .reverse()
+   *  .value();
+   * // => [2, 1]
+   */
+  function tap(value, interceptor) {
+    interceptor(value);
+    return value;
+  }
+
+  /**
+   * This method is like `_.tap` except that it returns the result of `interceptor`.
+   * The purpose of this method is to "pass thru" values replacing intermediate
+   * results in a method chain sequence.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Seq
+   * @param {*} value The value to provide to `interceptor`.
+   * @param {Function} interceptor The function to invoke.
+   * @returns {*} Returns the result of `interceptor`.
+   * @example
+   *
+   * _('  abc  ')
+   *  .chain()
+   *  .trim()
+   *  .thru(function(value) {
+   *    return [value];
+   *  })
+   *  .value();
+   * // => ['abc']
+   */
+  function thru(value, interceptor) {
+    return interceptor(value);
+  }
+
+  /**
+   * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+   *
+   * @name chain
+   * @memberOf _
+   * @since 0.1.0
+   * @category Seq
+   * @returns {Object} Returns the new `lodash` wrapper instance.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney', 'age': 36 },
+   *   { 'user': 'fred',   'age': 40 }
+   * ];
+   *
+   * // A sequence without explicit chaining.
+   * _(users).head();
+   * // => { 'user': 'barney', 'age': 36 }
+   *
+   * // A sequence with explicit chaining.
+   * _(users)
+   *   .chain()
+   *   .head()
+   *   .pick('user')
+   *   .value();
+   * // => { 'user': 'barney' }
+   */
+  function wrapperChain() {
+    return chain(this);
+  }
+
+  /**
+   * Executes the chain sequence to resolve the unwrapped value.
+   *
+   * @name value
+   * @memberOf _
+   * @since 0.1.0
+   * @alias toJSON, valueOf
+   * @category Seq
+   * @returns {*} Returns the resolved unwrapped value.
+   * @example
+   *
+   * _([1, 2, 3]).value();
+   * // => [1, 2, 3]
+   */
+  function wrapperValue() {
+    return baseWrapperValue(this.__wrapped__, this.__actions__);
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Checks if `predicate` returns truthy for **all** elements of `collection`.
+   * Iteration is stopped once `predicate` returns falsey. The predicate is
+   * invoked with three arguments: (value, index|key, collection).
+   *
+   * **Note:** This method returns `true` for
+   * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+   * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+   * elements of empty collections.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [predicate=_.identity] The function invoked per iteration.
+   * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+   * @returns {boolean} Returns `true` if all elements pass the predicate check,
+   *  else `false`.
+   * @example
+   *
+   * _.every([true, 1, null, 'yes'], Boolean);
+   * // => false
+   *
+   * var users = [
+   *   { 'user': 'barney', 'age': 36, 'active': false },
+   *   { 'user': 'fred',   'age': 40, 'active': false }
+   * ];
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.every(users, { 'user': 'barney', 'active': false });
+   * // => false
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.every(users, ['active', false]);
+   * // => true
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.every(users, 'active');
+   * // => false
+   */
+  function every(collection, predicate, guard) {
+    predicate = guard ? undefined : predicate;
+    return baseEvery(collection, baseIteratee(predicate));
+  }
+
+  /**
+   * Iterates over elements of `collection`, returning an array of all elements
+   * `predicate` returns truthy for. The predicate is invoked with three
+   * arguments: (value, index|key, collection).
+   *
+   * **Note:** Unlike `_.remove`, this method returns a new array.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [predicate=_.identity] The function invoked per iteration.
+   * @returns {Array} Returns the new filtered array.
+   * @see _.reject
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney', 'age': 36, 'active': true },
+   *   { 'user': 'fred',   'age': 40, 'active': false }
+   * ];
+   *
+   * _.filter(users, function(o) { return !o.active; });
+   * // => objects for ['fred']
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.filter(users, { 'age': 36, 'active': true });
+   * // => objects for ['barney']
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.filter(users, ['active', false]);
+   * // => objects for ['fred']
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.filter(users, 'active');
+   * // => objects for ['barney']
+   */
+  function filter(collection, predicate) {
+    return baseFilter(collection, baseIteratee(predicate));
+  }
+
+  /**
+   * Iterates over elements of `collection`, returning the first element
+   * `predicate` returns truthy for. The predicate is invoked with three
+   * arguments: (value, index|key, collection).
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to inspect.
+   * @param {Function} [predicate=_.identity] The function invoked per iteration.
+   * @param {number} [fromIndex=0] The index to search from.
+   * @returns {*} Returns the matched element, else `undefined`.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney',  'age': 36, 'active': true },
+   *   { 'user': 'fred',    'age': 40, 'active': false },
+   *   { 'user': 'pebbles', 'age': 1,  'active': true }
+   * ];
+   *
+   * _.find(users, function(o) { return o.age < 40; });
+   * // => object for 'barney'
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.find(users, { 'age': 1, 'active': true });
+   * // => object for 'pebbles'
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.find(users, ['active', false]);
+   * // => object for 'fred'
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.find(users, 'active');
+   * // => object for 'barney'
+   */
+  var find = createFind(findIndex);
+
+  /**
+   * Iterates over elements of `collection` and invokes `iteratee` for each element.
+   * The iteratee is invoked with three arguments: (value, index|key, collection).
+   * Iteratee functions may exit iteration early by explicitly returning `false`.
+   *
+   * **Note:** As with other "Collections" methods, objects with a "length"
+   * property are iterated like arrays. To avoid this behavior use `_.forIn`
+   * or `_.forOwn` for object iteration.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @alias each
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+   * @returns {Array|Object} Returns `collection`.
+   * @see _.forEachRight
+   * @example
+   *
+   * _.forEach([1, 2], function(value) {
+   *   console.log(value);
+   * });
+   * // => Logs `1` then `2`.
+   *
+   * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+   *   console.log(key);
+   * });
+   * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+   */
+  function forEach(collection, iteratee) {
+    return baseEach(collection, baseIteratee(iteratee));
+  }
+
+  /**
+   * Creates an array of values by running each element in `collection` thru
+   * `iteratee`. The iteratee is invoked with three arguments:
+   * (value, index|key, collection).
+   *
+   * Many lodash methods are guarded to work as iteratees for methods like
+   * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+   *
+   * The guarded methods are:
+   * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+   * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+   * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+   * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   * @example
+   *
+   * function square(n) {
+   *   return n * n;
+   * }
+   *
+   * _.map([4, 8], square);
+   * // => [16, 64]
+   *
+   * _.map({ 'a': 4, 'b': 8 }, square);
+   * // => [16, 64] (iteration order is not guaranteed)
+   *
+   * var users = [
+   *   { 'user': 'barney' },
+   *   { 'user': 'fred' }
+   * ];
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.map(users, 'user');
+   * // => ['barney', 'fred']
+   */
+  function map(collection, iteratee) {
+    return baseMap(collection, baseIteratee(iteratee));
+  }
+
+  /**
+   * Reduces `collection` to a value which is the accumulated result of running
+   * each element in `collection` thru `iteratee`, where each successive
+   * invocation is supplied the return value of the previous. If `accumulator`
+   * is not given, the first element of `collection` is used as the initial
+   * value. The iteratee is invoked with four arguments:
+   * (accumulator, value, index|key, collection).
+   *
+   * Many lodash methods are guarded to work as iteratees for methods like
+   * `_.reduce`, `_.reduceRight`, and `_.transform`.
+   *
+   * The guarded methods are:
+   * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+   * and `sortBy`
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+   * @param {*} [accumulator] The initial value.
+   * @returns {*} Returns the accumulated value.
+   * @see _.reduceRight
+   * @example
+   *
+   * _.reduce([1, 2], function(sum, n) {
+   *   return sum + n;
+   * }, 0);
+   * // => 3
+   *
+   * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+   *   (result[value] || (result[value] = [])).push(key);
+   *   return result;
+   * }, {});
+   * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+   */
+  function reduce(collection, iteratee, accumulator) {
+    return baseReduce(collection, baseIteratee(iteratee), accumulator, arguments.length < 3, baseEach);
+  }
+
+  /**
+   * Gets the size of `collection` by returning its length for array-like
+   * values or the number of own enumerable string keyed properties for objects.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object|string} collection The collection to inspect.
+   * @returns {number} Returns the collection size.
+   * @example
+   *
+   * _.size([1, 2, 3]);
+   * // => 3
+   *
+   * _.size({ 'a': 1, 'b': 2 });
+   * // => 2
+   *
+   * _.size('pebbles');
+   * // => 7
+   */
+  function size(collection) {
+    if (collection == null) {
+      return 0;
+    }
+    collection = isArrayLike(collection) ? collection : nativeKeys(collection);
+    return collection.length;
+  }
+
+  /**
+   * Checks if `predicate` returns truthy for **any** element of `collection`.
+   * Iteration is stopped once `predicate` returns truthy. The predicate is
+   * invoked with three arguments: (value, index|key, collection).
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} [predicate=_.identity] The function invoked per iteration.
+   * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+   * @returns {boolean} Returns `true` if any element passes the predicate check,
+   *  else `false`.
+   * @example
+   *
+   * _.some([null, 0, 'yes', false], Boolean);
+   * // => true
+   *
+   * var users = [
+   *   { 'user': 'barney', 'active': true },
+   *   { 'user': 'fred',   'active': false }
+   * ];
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.some(users, { 'user': 'barney', 'active': false });
+   * // => false
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.some(users, ['active', false]);
+   * // => true
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.some(users, 'active');
+   * // => true
+   */
+  function some(collection, predicate, guard) {
+    predicate = guard ? undefined : predicate;
+    return baseSome(collection, baseIteratee(predicate));
+  }
+
+  /**
+   * Creates an array of elements, sorted in ascending order by the results of
+   * running each element in a collection thru each iteratee. This method
+   * performs a stable sort, that is, it preserves the original sort order of
+   * equal elements. The iteratees are invoked with one argument: (value).
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Collection
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {...(Function|Function[])} [iteratees=[_.identity]]
+   *  The iteratees to sort by.
+   * @returns {Array} Returns the new sorted array.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'fred',   'age': 48 },
+   *   { 'user': 'barney', 'age': 36 },
+   *   { 'user': 'fred',   'age': 40 },
+   *   { 'user': 'barney', 'age': 34 }
+   * ];
+   *
+   * _.sortBy(users, [function(o) { return o.user; }]);
+   * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+   *
+   * _.sortBy(users, ['user', 'age']);
+   * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
+   */
+  function sortBy(collection, iteratee) {
+    var index = 0;
+    iteratee = baseIteratee(iteratee);
+
+    return baseMap(baseMap(collection, function(value, key, collection) {
+      return { 'value': value, 'index': index++, 'criteria': iteratee(value, key, collection) };
+    }).sort(function(object, other) {
+      return compareAscending(object.criteria, other.criteria) || (object.index - other.index);
+    }), baseProperty('value'));
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates a function that invokes `func`, with the `this` binding and arguments
+   * of the created function, while it's called less than `n` times. Subsequent
+   * calls to the created function return the result of the last `func` invocation.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Function
+   * @param {number} n The number of calls at which `func` is no longer invoked.
+   * @param {Function} func The function to restrict.
+   * @returns {Function} Returns the new restricted function.
+   * @example
+   *
+   * jQuery(element).on('click', _.before(5, addContactToList));
+   * // => Allows adding up to 4 contacts to the list.
+   */
+  function before(n, func) {
+    var result;
+    if (typeof func != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    n = toInteger(n);
+    return function() {
+      if (--n > 0) {
+        result = func.apply(this, arguments);
+      }
+      if (n <= 1) {
+        func = undefined;
+      }
+      return result;
+    };
+  }
+
+  /**
+   * Creates a function that invokes `func` with the `this` binding of `thisArg`
+   * and `partials` prepended to the arguments it receives.
+   *
+   * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+   * may be used as a placeholder for partially applied arguments.
+   *
+   * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+   * property of bound functions.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Function
+   * @param {Function} func The function to bind.
+   * @param {*} thisArg The `this` binding of `func`.
+   * @param {...*} [partials] The arguments to be partially applied.
+   * @returns {Function} Returns the new bound function.
+   * @example
+   *
+   * function greet(greeting, punctuation) {
+   *   return greeting + ' ' + this.user + punctuation;
+   * }
+   *
+   * var object = { 'user': 'fred' };
+   *
+   * var bound = _.bind(greet, object, 'hi');
+   * bound('!');
+   * // => 'hi fred!'
+   *
+   * // Bound with placeholders.
+   * var bound = _.bind(greet, object, _, '!');
+   * bound('hi');
+   * // => 'hi fred!'
+   */
+  var bind = baseRest(function(func, thisArg, partials) {
+    return createPartial(func, WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG, thisArg, partials);
+  });
+
+  /**
+   * Defers invoking the `func` until the current call stack has cleared. Any
+   * additional arguments are provided to `func` when it's invoked.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Function
+   * @param {Function} func The function to defer.
+   * @param {...*} [args] The arguments to invoke `func` with.
+   * @returns {number} Returns the timer id.
+   * @example
+   *
+   * _.defer(function(text) {
+   *   console.log(text);
+   * }, 'deferred');
+   * // => Logs 'deferred' after one millisecond.
+   */
+  var defer = baseRest(function(func, args) {
+    return baseDelay(func, 1, args);
+  });
+
+  /**
+   * Invokes `func` after `wait` milliseconds. Any additional arguments are
+   * provided to `func` when it's invoked.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Function
+   * @param {Function} func The function to delay.
+   * @param {number} wait The number of milliseconds to delay invocation.
+   * @param {...*} [args] The arguments to invoke `func` with.
+   * @returns {number} Returns the timer id.
+   * @example
+   *
+   * _.delay(function(text) {
+   *   console.log(text);
+   * }, 1000, 'later');
+   * // => Logs 'later' after one second.
+   */
+  var delay = baseRest(function(func, wait, args) {
+    return baseDelay(func, toNumber(wait) || 0, args);
+  });
+
+  /**
+   * Creates a function that negates the result of the predicate `func`. The
+   * `func` predicate is invoked with the `this` binding and arguments of the
+   * created function.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Function
+   * @param {Function} predicate The predicate to negate.
+   * @returns {Function} Returns the new negated function.
+   * @example
+   *
+   * function isEven(n) {
+   *   return n % 2 == 0;
+   * }
+   *
+   * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+   * // => [1, 3, 5]
+   */
+  function negate(predicate) {
+    if (typeof predicate != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    return function() {
+      var args = arguments;
+      return !predicate.apply(this, args);
+    };
+  }
+
+  /**
+   * Creates a function that is restricted to invoking `func` once. Repeat calls
+   * to the function return the value of the first invocation. The `func` is
+   * invoked with the `this` binding and arguments of the created function.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Function
+   * @param {Function} func The function to restrict.
+   * @returns {Function} Returns the new restricted function.
+   * @example
+   *
+   * var initialize = _.once(createApplication);
+   * initialize();
+   * initialize();
+   * // => `createApplication` is invoked once
+   */
+  function once(func) {
+    return before(2, func);
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Creates a shallow clone of `value`.
+   *
+   * **Note:** This method is loosely based on the
+   * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+   * and supports cloning arrays, array buffers, booleans, date objects, maps,
+   * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+   * arrays. The own enumerable properties of `arguments` objects are cloned
+   * as plain objects. An empty object is returned for uncloneable values such
+   * as error objects, functions, DOM nodes, and WeakMaps.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to clone.
+   * @returns {*} Returns the cloned value.
+   * @see _.cloneDeep
+   * @example
+   *
+   * var objects = [{ 'a': 1 }, { 'b': 2 }];
+   *
+   * var shallow = _.clone(objects);
+   * console.log(shallow[0] === objects[0]);
+   * // => true
+   */
+  function clone(value) {
+    if (!isObject(value)) {
+      return value;
+    }
+    return isArray(value) ? copyArray(value) : copyObject(value, nativeKeys(value));
+  }
+
+  /**
+   * Performs a
+   * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+   * comparison between two values to determine if they are equivalent.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+   * @example
+   *
+   * var object = { 'a': 1 };
+   * var other = { 'a': 1 };
+   *
+   * _.eq(object, object);
+   * // => true
+   *
+   * _.eq(object, other);
+   * // => false
+   *
+   * _.eq('a', 'a');
+   * // => true
+   *
+   * _.eq('a', Object('a'));
+   * // => false
+   *
+   * _.eq(NaN, NaN);
+   * // => true
+   */
+  function eq(value, other) {
+    return value === other || (value !== value && other !== other);
+  }
+
+  /**
+   * Checks if `value` is likely an `arguments` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+   *  else `false`.
+   * @example
+   *
+   * _.isArguments(function() { return arguments; }());
+   * // => true
+   *
+   * _.isArguments([1, 2, 3]);
+   * // => false
+   */
+  var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+    return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+      !propertyIsEnumerable.call(value, 'callee');
+  };
+
+  /**
+   * Checks if `value` is classified as an `Array` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+   * @example
+   *
+   * _.isArray([1, 2, 3]);
+   * // => true
+   *
+   * _.isArray(document.body.children);
+   * // => false
+   *
+   * _.isArray('abc');
+   * // => false
+   *
+   * _.isArray(_.noop);
+   * // => false
+   */
+  var isArray = Array.isArray;
+
+  /**
+   * Checks if `value` is array-like. A value is considered array-like if it's
+   * not a function and has a `value.length` that's an integer greater than or
+   * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+   * @example
+   *
+   * _.isArrayLike([1, 2, 3]);
+   * // => true
+   *
+   * _.isArrayLike(document.body.children);
+   * // => true
+   *
+   * _.isArrayLike('abc');
+   * // => true
+   *
+   * _.isArrayLike(_.noop);
+   * // => false
+   */
+  function isArrayLike(value) {
+    return value != null && isLength(value.length) && !isFunction(value);
+  }
+
+  /**
+   * Checks if `value` is classified as a boolean primitive or object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+   * @example
+   *
+   * _.isBoolean(false);
+   * // => true
+   *
+   * _.isBoolean(null);
+   * // => false
+   */
+  function isBoolean(value) {
+    return value === true || value === false ||
+      (isObjectLike(value) && baseGetTag(value) == boolTag);
+  }
+
+  /**
+   * Checks if `value` is classified as a `Date` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+   * @example
+   *
+   * _.isDate(new Date);
+   * // => true
+   *
+   * _.isDate('Mon April 23 2012');
+   * // => false
+   */
+  var isDate = baseIsDate;
+
+  /**
+   * Checks if `value` is an empty object, collection, map, or set.
+   *
+   * Objects are considered empty if they have no own enumerable string keyed
+   * properties.
+   *
+   * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+   * jQuery-like collections are considered empty if they have a `length` of `0`.
+   * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+   * @example
+   *
+   * _.isEmpty(null);
+   * // => true
+   *
+   * _.isEmpty(true);
+   * // => true
+   *
+   * _.isEmpty(1);
+   * // => true
+   *
+   * _.isEmpty([1, 2, 3]);
+   * // => false
+   *
+   * _.isEmpty({ 'a': 1 });
+   * // => false
+   */
+  function isEmpty(value) {
+    if (isArrayLike(value) &&
+        (isArray(value) || isString(value) ||
+          isFunction(value.splice) || isArguments(value))) {
+      return !value.length;
+    }
+    return !nativeKeys(value).length;
+  }
+
+  /**
+   * Performs a deep comparison between two values to determine if they are
+   * equivalent.
+   *
+   * **Note:** This method supports comparing arrays, array buffers, booleans,
+   * date objects, error objects, maps, numbers, `Object` objects, regexes,
+   * sets, strings, symbols, and typed arrays. `Object` objects are compared
+   * by their own, not inherited, enumerable properties. Functions and DOM
+   * nodes are compared by strict equality, i.e. `===`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+   * @example
+   *
+   * var object = { 'a': 1 };
+   * var other = { 'a': 1 };
+   *
+   * _.isEqual(object, other);
+   * // => true
+   *
+   * object === other;
+   * // => false
+   */
+  function isEqual(value, other) {
+    return baseIsEqual(value, other);
+  }
+
+  /**
+   * Checks if `value` is a finite primitive number.
+   *
+   * **Note:** This method is based on
+   * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+   * @example
+   *
+   * _.isFinite(3);
+   * // => true
+   *
+   * _.isFinite(Number.MIN_VALUE);
+   * // => true
+   *
+   * _.isFinite(Infinity);
+   * // => false
+   *
+   * _.isFinite('3');
+   * // => false
+   */
+  function isFinite(value) {
+    return typeof value == 'number' && nativeIsFinite(value);
+  }
+
+  /**
+   * Checks if `value` is classified as a `Function` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+   * @example
+   *
+   * _.isFunction(_);
+   * // => true
+   *
+   * _.isFunction(/abc/);
+   * // => false
+   */
+  function isFunction(value) {
+    if (!isObject(value)) {
+      return false;
+    }
+    // The use of `Object#toString` avoids issues with the `typeof` operator
+    // in Safari 9 which returns 'object' for typed arrays and other constructors.
+    var tag = baseGetTag(value);
+    return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
+  }
+
+  /**
+   * Checks if `value` is a valid array-like length.
+   *
+   * **Note:** This method is loosely based on
+   * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+   * @example
+   *
+   * _.isLength(3);
+   * // => true
+   *
+   * _.isLength(Number.MIN_VALUE);
+   * // => false
+   *
+   * _.isLength(Infinity);
+   * // => false
+   *
+   * _.isLength('3');
+   * // => false
+   */
+  function isLength(value) {
+    return typeof value == 'number' &&
+      value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+  }
+
+  /**
+   * Checks if `value` is the
+   * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+   * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+   * @example
+   *
+   * _.isObject({});
+   * // => true
+   *
+   * _.isObject([1, 2, 3]);
+   * // => true
+   *
+   * _.isObject(_.noop);
+   * // => true
+   *
+   * _.isObject(null);
+   * // => false
+   */
+  function isObject(value) {
+    var type = typeof value;
+    return value != null && (type == 'object' || type == 'function');
+  }
+
+  /**
+   * Checks if `value` is object-like. A value is object-like if it's not `null`
+   * and has a `typeof` result of "object".
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+   * @example
+   *
+   * _.isObjectLike({});
+   * // => true
+   *
+   * _.isObjectLike([1, 2, 3]);
+   * // => true
+   *
+   * _.isObjectLike(_.noop);
+   * // => false
+   *
+   * _.isObjectLike(null);
+   * // => false
+   */
+  function isObjectLike(value) {
+    return value != null && typeof value == 'object';
+  }
+
+  /**
+   * Checks if `value` is `NaN`.
+   *
+   * **Note:** This method is based on
+   * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+   * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+   * `undefined` and other non-number values.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+   * @example
+   *
+   * _.isNaN(NaN);
+   * // => true
+   *
+   * _.isNaN(new Number(NaN));
+   * // => true
+   *
+   * isNaN(undefined);
+   * // => true
+   *
+   * _.isNaN(undefined);
+   * // => false
+   */
+  function isNaN(value) {
+    // An `NaN` primitive is the only value that is not equal to itself.
+    // Perform the `toStringTag` check first to avoid errors with some
+    // ActiveX objects in IE.
+    return isNumber(value) && value != +value;
+  }
+
+  /**
+   * Checks if `value` is `null`.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+   * @example
+   *
+   * _.isNull(null);
+   * // => true
+   *
+   * _.isNull(void 0);
+   * // => false
+   */
+  function isNull(value) {
+    return value === null;
+  }
+
+  /**
+   * Checks if `value` is classified as a `Number` primitive or object.
+   *
+   * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+   * classified as numbers, use the `_.isFinite` method.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+   * @example
+   *
+   * _.isNumber(3);
+   * // => true
+   *
+   * _.isNumber(Number.MIN_VALUE);
+   * // => true
+   *
+   * _.isNumber(Infinity);
+   * // => true
+   *
+   * _.isNumber('3');
+   * // => false
+   */
+  function isNumber(value) {
+    return typeof value == 'number' ||
+      (isObjectLike(value) && baseGetTag(value) == numberTag);
+  }
+
+  /**
+   * Checks if `value` is classified as a `RegExp` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 0.1.0
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+   * @example
+   *
+   * _.isRegExp(/abc/);
+   * // => true
+   *
+   * _.isRegExp('/abc/');
+   * // => false
+   */
+  var isRegExp = baseIsRegExp;
+
+  /**
+   * Checks if `value` is classified as a `String` primitive or object.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+   * @example
+   *
+   * _.isString('abc');
+   * // => true
+   *
+   * _.isString(1);
+   * // => false
+   */
+  function isString(value) {
+    return typeof value == 'string' ||
+      (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
+  }
+
+  /**
+   * Checks if `value` is `undefined`.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+   * @example
+   *
+   * _.isUndefined(void 0);
+   * // => true
+   *
+   * _.isUndefined(null);
+   * // => false
+   */
+  function isUndefined(value) {
+    return value === undefined;
+  }
+
+  /**
+   * Converts `value` to an array.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to convert.
+   * @returns {Array} Returns the converted array.
+   * @example
+   *
+   * _.toArray({ 'a': 1, 'b': 2 });
+   * // => [1, 2]
+   *
+   * _.toArray('abc');
+   * // => ['a', 'b', 'c']
+   *
+   * _.toArray(1);
+   * // => []
+   *
+   * _.toArray(null);
+   * // => []
+   */
+  function toArray(value) {
+    if (!isArrayLike(value)) {
+      return values(value);
+    }
+    return value.length ? copyArray(value) : [];
+  }
+
+  /**
+   * Converts `value` to an integer.
+   *
+   * **Note:** This method is loosely based on
+   * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to convert.
+   * @returns {number} Returns the converted integer.
+   * @example
+   *
+   * _.toInteger(3.2);
+   * // => 3
+   *
+   * _.toInteger(Number.MIN_VALUE);
+   * // => 0
+   *
+   * _.toInteger(Infinity);
+   * // => 1.7976931348623157e+308
+   *
+   * _.toInteger('3.2');
+   * // => 3
+   */
+  var toInteger = Number;
+
+  /**
+   * Converts `value` to a number.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to process.
+   * @returns {number} Returns the number.
+   * @example
+   *
+   * _.toNumber(3.2);
+   * // => 3.2
+   *
+   * _.toNumber(Number.MIN_VALUE);
+   * // => 5e-324
+   *
+   * _.toNumber(Infinity);
+   * // => Infinity
+   *
+   * _.toNumber('3.2');
+   * // => 3.2
+   */
+  var toNumber = Number;
+
+  /**
+   * Converts `value` to a string. An empty string is returned for `null`
+   * and `undefined` values. The sign of `-0` is preserved.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @category Lang
+   * @param {*} value The value to convert.
+   * @returns {string} Returns the converted string.
+   * @example
+   *
+   * _.toString(null);
+   * // => ''
+   *
+   * _.toString(-0);
+   * // => '-0'
+   *
+   * _.toString([1, 2, 3]);
+   * // => '1,2,3'
+   */
+  function toString(value) {
+    if (typeof value == 'string') {
+      return value;
+    }
+    return value == null ? '' : (value + '');
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Assigns own enumerable string keyed properties of source objects to the
+   * destination object. Source objects are applied from left to right.
+   * Subsequent sources overwrite property assignments of previous sources.
+   *
+   * **Note:** This method mutates `object` and is loosely based on
+   * [`Object.assign`](https://mdn.io/Object/assign).
+   *
+   * @static
+   * @memberOf _
+   * @since 0.10.0
+   * @category Object
+   * @param {Object} object The destination object.
+   * @param {...Object} [sources] The source objects.
+   * @returns {Object} Returns `object`.
+   * @see _.assignIn
+   * @example
+   *
+   * function Foo() {
+   *   this.a = 1;
+   * }
+   *
+   * function Bar() {
+   *   this.c = 3;
+   * }
+   *
+   * Foo.prototype.b = 2;
+   * Bar.prototype.d = 4;
+   *
+   * _.assign({ 'a': 0 }, new Foo, new Bar);
+   * // => { 'a': 1, 'c': 3 }
+   */
+  var assign = createAssigner(function(object, source) {
+    copyObject(source, nativeKeys(source), object);
+  });
+
+  /**
+   * This method is like `_.assign` except that it iterates over own and
+   * inherited source properties.
+   *
+   * **Note:** This method mutates `object`.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @alias extend
+   * @category Object
+   * @param {Object} object The destination object.
+   * @param {...Object} [sources] The source objects.
+   * @returns {Object} Returns `object`.
+   * @see _.assign
+   * @example
+   *
+   * function Foo() {
+   *   this.a = 1;
+   * }
+   *
+   * function Bar() {
+   *   this.c = 3;
+   * }
+   *
+   * Foo.prototype.b = 2;
+   * Bar.prototype.d = 4;
+   *
+   * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+   * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+   */
+  var assignIn = createAssigner(function(object, source) {
+    copyObject(source, nativeKeysIn(source), object);
+  });
+
+  /**
+   * This method is like `_.assignIn` except that it accepts `customizer`
+   * which is invoked to produce the assigned values. If `customizer` returns
+   * `undefined`, assignment is handled by the method instead. The `customizer`
+   * is invoked with five arguments: (objValue, srcValue, key, object, source).
+   *
+   * **Note:** This method mutates `object`.
+   *
+   * @static
+   * @memberOf _
+   * @since 4.0.0
+   * @alias extendWith
+   * @category Object
+   * @param {Object} object The destination object.
+   * @param {...Object} sources The source objects.
+   * @param {Function} [customizer] The function to customize assigned values.
+   * @returns {Object} Returns `object`.
+   * @see _.assignWith
+   * @example
+   *
+   * function customizer(objValue, srcValue) {
+   *   return _.isUndefined(objValue) ? srcValue : objValue;
+   * }
+   *
+   * var defaults = _.partialRight(_.assignInWith, customizer);
+   *
+   * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+   * // => { 'a': 1, 'b': 2 }
+   */
+  var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
+    copyObject(source, keysIn(source), object, customizer);
+  });
+
+  /**
+   * Creates an object that inherits from the `prototype` object. If a
+   * `properties` object is given, its own enumerable string keyed properties
+   * are assigned to the created object.
+   *
+   * @static
+   * @memberOf _
+   * @since 2.3.0
+   * @category Object
+   * @param {Object} prototype The object to inherit from.
+   * @param {Object} [properties] The properties to assign to the object.
+   * @returns {Object} Returns the new object.
+   * @example
+   *
+   * function Shape() {
+   *   this.x = 0;
+   *   this.y = 0;
+   * }
+   *
+   * function Circle() {
+   *   Shape.call(this);
+   * }
+   *
+   * Circle.prototype = _.create(Shape.prototype, {
+   *   'constructor': Circle
+   * });
+   *
+   * var circle = new Circle;
+   * circle instanceof Circle;
+   * // => true
+   *
+   * circle instanceof Shape;
+   * // => true
+   */
+  function create(prototype, properties) {
+    var result = baseCreate(prototype);
+    return properties == null ? result : assign(result, properties);
+  }
+
+  /**
+   * Assigns own and inherited enumerable string keyed properties of source
+   * objects to the destination object for all destination properties that
+   * resolve to `undefined`. Source objects are applied from left to right.
+   * Once a property is set, additional values of the same property are ignored.
+   *
+   * **Note:** This method mutates `object`.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The destination object.
+   * @param {...Object} [sources] The source objects.
+   * @returns {Object} Returns `object`.
+   * @see _.defaultsDeep
+   * @example
+   *
+   * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+   * // => { 'a': 1, 'b': 2 }
+   */
+  var defaults = baseRest(function(args) {
+    args.push(undefined, customDefaultsAssignIn);
+    return assignInWith.apply(undefined, args);
+  });
+
+  /**
+   * Checks if `path` is a direct property of `object`.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to query.
+   * @param {Array|string} path The path to check.
+   * @returns {boolean} Returns `true` if `path` exists, else `false`.
+   * @example
+   *
+   * var object = { 'a': { 'b': 2 } };
+   * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+   *
+   * _.has(object, 'a');
+   * // => true
+   *
+   * _.has(object, 'a.b');
+   * // => true
+   *
+   * _.has(object, ['a', 'b']);
+   * // => true
+   *
+   * _.has(other, 'a');
+   * // => false
+   */
+  function has(object, path) {
+    return object != null && hasOwnProperty.call(object, path);
+  }
+
+  /**
+   * Creates an array of the own enumerable property names of `object`.
+   *
+   * **Note:** Non-object values are coerced to objects. See the
+   * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+   * for more details.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to query.
+   * @returns {Array} Returns the array of property names.
+   * @example
+   *
+   * function Foo() {
+   *   this.a = 1;
+   *   this.b = 2;
+   * }
+   *
+   * Foo.prototype.c = 3;
+   *
+   * _.keys(new Foo);
+   * // => ['a', 'b'] (iteration order is not guaranteed)
+   *
+   * _.keys('hi');
+   * // => ['0', '1']
+   */
+  var keys = nativeKeys;
+
+  /**
+   * Creates an array of the own and inherited enumerable property names of `object`.
+   *
+   * **Note:** Non-object values are coerced to objects.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Object
+   * @param {Object} object The object to query.
+   * @returns {Array} Returns the array of property names.
+   * @example
+   *
+   * function Foo() {
+   *   this.a = 1;
+   *   this.b = 2;
+   * }
+   *
+   * Foo.prototype.c = 3;
+   *
+   * _.keysIn(new Foo);
+   * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+   */
+  var keysIn = nativeKeysIn;
+
+  /**
+   * Creates an object composed of the picked `object` properties.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The source object.
+   * @param {...(string|string[])} [paths] The property paths to pick.
+   * @returns {Object} Returns the new object.
+   * @example
+   *
+   * var object = { 'a': 1, 'b': '2', 'c': 3 };
+   *
+   * _.pick(object, ['a', 'c']);
+   * // => { 'a': 1, 'c': 3 }
+   */
+  var pick = flatRest(function(object, paths) {
+    return object == null ? {} : basePick(object, paths);
+  });
+
+  /**
+   * This method is like `_.get` except that if the resolved value is a
+   * function it's invoked with the `this` binding of its parent object and
+   * its result is returned.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to query.
+   * @param {Array|string} path The path of the property to resolve.
+   * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+   * @returns {*} Returns the resolved value.
+   * @example
+   *
+   * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+   *
+   * _.result(object, 'a[0].b.c1');
+   * // => 3
+   *
+   * _.result(object, 'a[0].b.c2');
+   * // => 4
+   *
+   * _.result(object, 'a[0].b.c3', 'default');
+   * // => 'default'
+   *
+   * _.result(object, 'a[0].b.c3', _.constant('default'));
+   * // => 'default'
+   */
+  function result(object, path, defaultValue) {
+    var value = object == null ? undefined : object[path];
+    if (value === undefined) {
+      value = defaultValue;
+    }
+    return isFunction(value) ? value.call(object) : value;
+  }
+
+  /**
+   * Creates an array of the own enumerable string keyed property values of `object`.
+   *
+   * **Note:** Non-object values are coerced to objects.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Object
+   * @param {Object} object The object to query.
+   * @returns {Array} Returns the array of property values.
+   * @example
+   *
+   * function Foo() {
+   *   this.a = 1;
+   *   this.b = 2;
+   * }
+   *
+   * Foo.prototype.c = 3;
+   *
+   * _.values(new Foo);
+   * // => [1, 2] (iteration order is not guaranteed)
+   *
+   * _.values('hi');
+   * // => ['h', 'i']
+   */
+  function values(object) {
+    return object == null ? [] : baseValues(object, keys(object));
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+   * corresponding HTML entities.
+   *
+   * **Note:** No other characters are escaped. To escape additional
+   * characters use a third-party library like [_he_](https://mths.be/he).
+   *
+   * Though the ">" character is escaped for symmetry, characters like
+   * ">" and "/" don't need escaping in HTML and have no special meaning
+   * unless they're part of a tag or unquoted attribute value. See
+   * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+   * (under "semi-related fun fact") for more details.
+   *
+   * When working with HTML you should always
+   * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+   * XSS vectors.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category String
+   * @param {string} [string=''] The string to escape.
+   * @returns {string} Returns the escaped string.
+   * @example
+   *
+   * _.escape('fred, barney, & pebbles');
+   * // => 'fred, barney, &amp; pebbles'
+   */
+  function escape(string) {
+    string = toString(string);
+    return (string && reHasUnescapedHtml.test(string))
+      ? string.replace(reUnescapedHtml, escapeHtmlChar)
+      : string;
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * This method returns the first argument it receives.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Util
+   * @param {*} value Any value.
+   * @returns {*} Returns `value`.
+   * @example
+   *
+   * var object = { 'a': 1 };
+   *
+   * console.log(_.identity(object) === object);
+   * // => true
+   */
+  function identity(value) {
+    return value;
+  }
+
+  /**
+   * Creates a function that invokes `func` with the arguments of the created
+   * function. If `func` is a property name, the created function returns the
+   * property value for a given element. If `func` is an array or object, the
+   * created function returns `true` for elements that contain the equivalent
+   * source properties, otherwise it returns `false`.
+   *
+   * @static
+   * @since 4.0.0
+   * @memberOf _
+   * @category Util
+   * @param {*} [func=_.identity] The value to convert to a callback.
+   * @returns {Function} Returns the callback.
+   * @example
+   *
+   * var users = [
+   *   { 'user': 'barney', 'age': 36, 'active': true },
+   *   { 'user': 'fred',   'age': 40, 'active': false }
+   * ];
+   *
+   * // The `_.matches` iteratee shorthand.
+   * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+   * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+   *
+   * // The `_.matchesProperty` iteratee shorthand.
+   * _.filter(users, _.iteratee(['user', 'fred']));
+   * // => [{ 'user': 'fred', 'age': 40 }]
+   *
+   * // The `_.property` iteratee shorthand.
+   * _.map(users, _.iteratee('user'));
+   * // => ['barney', 'fred']
+   *
+   * // Create custom iteratee shorthands.
+   * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+   *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+   *     return func.test(string);
+   *   };
+   * });
+   *
+   * _.filter(['abc', 'def'], /ef/);
+   * // => ['def']
+   */
+  var iteratee = baseIteratee;
+
+  /**
+   * Creates a function that performs a partial deep comparison between a given
+   * object and `source`, returning `true` if the given object has equivalent
+   * property values, else `false`.
+   *
+   * **Note:** The created function is equivalent to `_.isMatch` with `source`
+   * partially applied.
+   *
+   * Partial comparisons will match empty array and empty object `source`
+   * values against any array or object value, respectively. See `_.isEqual`
+   * for a list of supported value comparisons.
+   *
+   * @static
+   * @memberOf _
+   * @since 3.0.0
+   * @category Util
+   * @param {Object} source The object of property values to match.
+   * @returns {Function} Returns the new spec function.
+   * @example
+   *
+   * var objects = [
+   *   { 'a': 1, 'b': 2, 'c': 3 },
+   *   { 'a': 4, 'b': 5, 'c': 6 }
+   * ];
+   *
+   * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+   * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
+   */
+  function matches(source) {
+    return baseMatches(assign({}, source));
+  }
+
+  /**
+   * Adds all own enumerable string keyed function properties of a source
+   * object to the destination object. If `object` is a function, then methods
+   * are added to its prototype as well.
+   *
+   * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
+   * avoid conflicts caused by modifying the original.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Util
+   * @param {Function|Object} [object=lodash] The destination object.
+   * @param {Object} source The object of functions to add.
+   * @param {Object} [options={}] The options object.
+   * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
+   * @returns {Function|Object} Returns `object`.
+   * @example
+   *
+   * function vowels(string) {
+   *   return _.filter(string, function(v) {
+   *     return /[aeiou]/i.test(v);
+   *   });
+   * }
+   *
+   * _.mixin({ 'vowels': vowels });
+   * _.vowels('fred');
+   * // => ['e']
+   *
+   * _('fred').vowels().value();
+   * // => ['e']
+   *
+   * _.mixin({ 'vowels': vowels }, { 'chain': false });
+   * _('fred').vowels();
+   * // => ['e']
+   */
+  function mixin(object, source, options) {
+    var props = keys(source),
+        methodNames = baseFunctions(source, props);
+
+    if (options == null &&
+        !(isObject(source) && (methodNames.length || !props.length))) {
+      options = source;
+      source = object;
+      object = this;
+      methodNames = baseFunctions(source, keys(source));
+    }
+    var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
+        isFunc = isFunction(object);
+
+    baseEach(methodNames, function(methodName) {
+      var func = source[methodName];
+      object[methodName] = func;
+      if (isFunc) {
+        object.prototype[methodName] = function() {
+          var chainAll = this.__chain__;
+          if (chain || chainAll) {
+            var result = object(this.__wrapped__),
+                actions = result.__actions__ = copyArray(this.__actions__);
+
+            actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
+            result.__chain__ = chainAll;
+            return result;
+          }
+          return func.apply(object, arrayPush([this.value()], arguments));
+        };
+      }
+    });
+
+    return object;
+  }
+
+  /**
+   * Reverts the `_` variable to its previous value and returns a reference to
+   * the `lodash` function.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Util
+   * @returns {Function} Returns the `lodash` function.
+   * @example
+   *
+   * var lodash = _.noConflict();
+   */
+  function noConflict() {
+    if (root._ === this) {
+      root._ = oldDash;
+    }
+    return this;
+  }
+
+  /**
+   * This method returns `undefined`.
+   *
+   * @static
+   * @memberOf _
+   * @since 2.3.0
+   * @category Util
+   * @example
+   *
+   * _.times(2, _.noop);
+   * // => [undefined, undefined]
+   */
+  function noop() {
+    // No operation performed.
+  }
+
+  /**
+   * Generates a unique ID. If `prefix` is given, the ID is appended to it.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Util
+   * @param {string} [prefix=''] The value to prefix the ID with.
+   * @returns {string} Returns the unique ID.
+   * @example
+   *
+   * _.uniqueId('contact_');
+   * // => 'contact_104'
+   *
+   * _.uniqueId();
+   * // => '105'
+   */
+  function uniqueId(prefix) {
+    var id = ++idCounter;
+    return toString(prefix) + id;
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * Computes the maximum value of `array`. If `array` is empty or falsey,
+   * `undefined` is returned.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Math
+   * @param {Array} array The array to iterate over.
+   * @returns {*} Returns the maximum value.
+   * @example
+   *
+   * _.max([4, 2, 8, 6]);
+   * // => 8
+   *
+   * _.max([]);
+   * // => undefined
+   */
+  function max(array) {
+    return (array && array.length)
+      ? baseExtremum(array, identity, baseGt)
+      : undefined;
+  }
+
+  /**
+   * Computes the minimum value of `array`. If `array` is empty or falsey,
+   * `undefined` is returned.
+   *
+   * @static
+   * @since 0.1.0
+   * @memberOf _
+   * @category Math
+   * @param {Array} array The array to iterate over.
+   * @returns {*} Returns the minimum value.
+   * @example
+   *
+   * _.min([4, 2, 8, 6]);
+   * // => 2
+   *
+   * _.min([]);
+   * // => undefined
+   */
+  function min(array) {
+    return (array && array.length)
+      ? baseExtremum(array, identity, baseLt)
+      : undefined;
+  }
+
+  /*------------------------------------------------------------------------*/
+
+  // Add methods that return wrapped values in chain sequences.
+  lodash.assignIn = assignIn;
+  lodash.before = before;
+  lodash.bind = bind;
+  lodash.chain = chain;
+  lodash.compact = compact;
+  lodash.concat = concat;
+  lodash.create = create;
+  lodash.defaults = defaults;
+  lodash.defer = defer;
+  lodash.delay = delay;
+  lodash.filter = filter;
+  lodash.flatten = flatten;
+  lodash.flattenDeep = flattenDeep;
+  lodash.iteratee = iteratee;
+  lodash.keys = keys;
+  lodash.map = map;
+  lodash.matches = matches;
+  lodash.mixin = mixin;
+  lodash.negate = negate;
+  lodash.once = once;
+  lodash.pick = pick;
+  lodash.slice = slice;
+  lodash.sortBy = sortBy;
+  lodash.tap = tap;
+  lodash.thru = thru;
+  lodash.toArray = toArray;
+  lodash.values = values;
+
+  // Add aliases.
+  lodash.extend = assignIn;
+
+  // Add methods to `lodash.prototype`.
+  mixin(lodash, lodash);
+
+  /*------------------------------------------------------------------------*/
+
+  // Add methods that return unwrapped values in chain sequences.
+  lodash.clone = clone;
+  lodash.escape = escape;
+  lodash.every = every;
+  lodash.find = find;
+  lodash.forEach = forEach;
+  lodash.has = has;
+  lodash.head = head;
+  lodash.identity = identity;
+  lodash.indexOf = indexOf;
+  lodash.isArguments = isArguments;
+  lodash.isArray = isArray;
+  lodash.isBoolean = isBoolean;
+  lodash.isDate = isDate;
+  lodash.isEmpty = isEmpty;
+  lodash.isEqual = isEqual;
+  lodash.isFinite = isFinite;
+  lodash.isFunction = isFunction;
+  lodash.isNaN = isNaN;
+  lodash.isNull = isNull;
+  lodash.isNumber = isNumber;
+  lodash.isObject = isObject;
+  lodash.isRegExp = isRegExp;
+  lodash.isString = isString;
+  lodash.isUndefined = isUndefined;
+  lodash.last = last;
+  lodash.max = max;
+  lodash.min = min;
+  lodash.noConflict = noConflict;
+  lodash.noop = noop;
+  lodash.reduce = reduce;
+  lodash.result = result;
+  lodash.size = size;
+  lodash.some = some;
+  lodash.uniqueId = uniqueId;
+
+  // Add aliases.
+  lodash.each = forEach;
+  lodash.first = head;
+
+  mixin(lodash, (function() {
+    var source = {};
+    baseForOwn(lodash, function(func, methodName) {
+      if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+        source[methodName] = func;
+      }
+    });
+    return source;
+  }()), { 'chain': false });
+
+  /*------------------------------------------------------------------------*/
+
+  /**
+   * The semantic version number.
+   *
+   * @static
+   * @memberOf _
+   * @type {string}
+   */
+  lodash.VERSION = VERSION;
+
+  // Add `Array` methods to `lodash.prototype`.
+  baseEach(['pop', 'join', 'replace', 'reverse', 'split', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
+    var func = (/^(?:replace|split)$/.test(methodName) ? String.prototype : arrayProto)[methodName],
+        chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+        retUnwrapped = /^(?:pop|join|replace|shift)$/.test(methodName);
+
+    lodash.prototype[methodName] = function() {
+      var args = arguments;
+      if (retUnwrapped && !this.__chain__) {
+        var value = this.value();
+        return func.apply(isArray(value) ? value : [], args);
+      }
+      return this[chainName](function(value) {
+        return func.apply(isArray(value) ? value : [], args);
+      });
+    };
+  });
+
+  // Add chain sequence methods to the `lodash` wrapper.
+  lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
+
+  /*--------------------------------------------------------------------------*/
+
+  // Some AMD build optimizers, like r.js, check for condition patterns like:
+  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
+    // Expose Lodash on the global object to prevent errors when Lodash is
+    // loaded by a script tag in the presence of an AMD loader.
+    // See http://requirejs.org/docs/errors.html#mismatch for more details.
+    // Use `_.noConflict` to remove Lodash from the global object.
+    root._ = lodash;
+
+    // Define as an anonymous module so, through path mapping, it can be
+    // referenced as the "underscore" module.
+    define(function() {
+      return lodash;
+    });
+  }
+  // Check for `exports` after `define` in case a build optimizer adds it.
+  else if (freeModule) {
+    // Export for Node.js.
+    (freeModule.exports = lodash)._ = lodash;
+    // Export for CommonJS support.
+    freeExports._ = lodash;
+  }
+  else {
+    // Export to the global object.
+    root._ = lodash;
+  }
+}.call(this));




diff --git a/plugins/stores_app/views/layouts/stores_app_plugin/_head.slim b/plugins/stores_app/views/layouts/stores_app_plugin/_head.slim
index d36684c3f14f2f2b2f56748b4c430e08609fdfa0..8d0d0ee0c0d16b9eba70e0290d009e20814a6d78 100644
--- a/plugins/stores_app/views/layouts/stores_app_plugin/_head.slim
+++ b/plugins/stores_app/views/layouts/stores_app_plugin/_head.slim
@@ -5,6 +5,7 @@ = javascript_include_tag 'stores_app_plugin/vendor/material'
 link rel='stylesheet' href='https://fonts.googleapis.com/icon?family=Material+Icons'
 
 = javascript_include_tag 'stores_app_plugin/vendor/riot'
+= javascript_include_tag 'stores_app_plugin/vendor/lodash'
 
 = stylesheet_link_tag 'stores_app_plugin/style'
 = javascript_include_tag 'stores_app_plugin/store'




diff --git a/plugins/stores_app/views/layouts/stores_app_plugin/_tags.slim b/plugins/stores_app/views/layouts/stores_app_plugin/_tags.slim
index 80884d4c69ab665ac648ea1c4c59eb924d45f381..91c46675f0ee6923879e7da7f1a1a3f512a91720 100644
--- a/plugins/stores_app/views/layouts/stores_app_plugin/_tags.slim
+++ b/plugins/stores_app/views/layouts/stores_app_plugin/_tags.slim
@@ -1,4 +1,5 @@
 = javascript_include_tag 'stores_app_plugin/tags/app'
-= javascript_include_tag 'stores_app_plugin/tags/app/header'
-= javascript_include_tag 'stores_app_plugin/tags/app/menu'
 = javascript_include_tag 'stores_app_plugin/tags/app/tabs'
+= javascript_include_tag 'stores_app_plugin/tags/catalog'
+= javascript_include_tag 'stores_app_plugin/tags/product'
+




diff --git a/plugins/stores_app/views/layouts/stores_app_plugin/layout.html.slim b/plugins/stores_app/views/layouts/stores_app_plugin/layout.html.slim
index 7145c1bc0f392282fd0ae1184b9db64bd89309fe..4aa1644077d9e0539a49444a54265a596a32b68e 100644
--- a/plugins/stores_app/views/layouts/stores_app_plugin/layout.html.slim
+++ b/plugins/stores_app/views/layouts/stores_app_plugin/layout.html.slim
@@ -10,7 +10,5 @@   body
     app
 
     = render 'layouts/stores_app_plugin/tags'
-    javascript:
-      window.profile = {name: #{profile.name.to_json}}
-      store.load()
+    = yield
 




diff --git a/plugins/stores_app/views/stores_app_plugin/application/index.slim b/plugins/stores_app/views/stores_app_plugin/application/index.slim
index 8b137891791fe96927ad78e64b0aad7bded08bdc..d9de1755d71b2cc891a1b9d21e7bdded4b8ec4dd 100644
--- a/plugins/stores_app/views/stores_app_plugin/application/index.slim
+++ b/plugins/stores_app/views/stores_app_plugin/application/index.slim
@@ -1 +1,6 @@
 
+javascript:
+  window.profile = {name: #{profile.name.to_json}}
+  store.catalog  = #{StoresAppPlugin::CatalogSerializer.new(profile).to_json.html_safe}
+  store.load()
+




diff --git a/plugins/suppliers/lib/ext/products_plugin/product.rb b/plugins/suppliers/lib/ext/products_plugin/product.rb
index 4363abcdfc29e281db18c2ba39dbcd5bed8329e9..abdcb2f5c95059dda50485b978ede6ef3304b9c9 100644
--- a/plugins/suppliers/lib/ext/products_plugin/product.rb
+++ b/plugins/suppliers/lib/ext/products_plugin/product.rb
@@ -1,5 +1,16 @@
 require_dependency 'products_plugin/product'
 
+ActiveSupport.on_load :solr_product do
+  ::ProductsPlugin::Product.class_eval do
+
+    def solr_supplied
+      self.supplied?
+    end
+
+    self.solr_extra_fields << :solr_supplied
+  end
+end
+
 module ProductsPlugin
   class Product
 




diff --git a/plugins/suppliers/lib/suppliers_plugin/base.rb b/plugins/suppliers/lib/suppliers_plugin/base.rb
index 60341ff743bff8ef7c8f6fc5dc3c92724f762cef..53cc5f4e004e489bab02bd0e410cfcc9ef9d2073 100644
--- a/plugins/suppliers/lib/suppliers_plugin/base.rb
+++ b/plugins/suppliers/lib/suppliers_plugin/base.rb
@@ -59,14 +59,3 @@   end
 
 end
 
-ActiveSupport.on_load :solr_product do
-  ::ProductsPlugin::Product.class_eval do
-
-    def solr_supplied
-      self.supplied?
-    end
-
-    self.solr_extra_fields << :solr_supplied
-  end
-end
-








diff --git a/public/javascripts/i18n.js b/public/javascripts/i18n.js
index ddb9de41643e735bfeebe0d8cb4d02f1307814ee..e3ada2bbd99c42b4ea3f4dd24d6b515dddc75809 100644
--- a/public/javascripts/i18n.js
+++ b/public/javascripts/i18n.js
@@ -12,16 +12,23 @@ //
 // See tests for specific formatting like numbers and dates.
 //
 
-(function( global, factory ) {
-
-  if ( typeof module === "object" && typeof module.exports === "object" ) {
-    module.exports = factory(global);
+// Using UMD pattern from
+// https://github.com/umdjs/umd#regular-module
+// `returnExports.js` version
+;(function (root, factory) {
+  if (typeof define === 'function' && define.amd) {
+    // AMD. Register as an anonymous module.
+    define("i18n", function(){ return factory(root);});
+  } else if (typeof module === 'object' && module.exports) {
+    // Node. Does not work with strict CommonJS, but
+    // only CommonJS-like environments that support module.exports,
+    // like Node.
+    module.exports = factory(root);
   } else {
-    factory( global );
+    // Browser globals (root is window)
+    root.I18n = factory(root);
   }
-
-// Pass this if window is not defined yet
-}(typeof window !== "undefined" ? window : this, function( global, noGlobal ) {
+}(this, function(global) {
   "use strict";
 
   // Use previously defined object if exists in current scope
@@ -35,6 +42,73 @@   var padding = function(number) {
     return ("0" + number.toString()).substr(-2);
   };
 
+  // Improved toFixed number rounding function with support for unprecise floating points
+  // JavaScript's standard toFixed function does not round certain numbers correctly (for example 0.105 with precision 2).
+  var toFixed = function(number, precision) {
+    return decimalAdjust('round', number, -precision).toFixed(precision);
+  };
+
+  // Is a given variable an object?
+  // Borrowed from Underscore.js
+  var isObject = function(obj) {
+    var type = typeof obj;
+    return type === 'function' || type === 'object' && !!obj;
+  };
+
+  // Is a given value an array?
+  // Borrowed from Underscore.js
+  var isArray = function(val) {
+    if (Array.isArray) {
+      return Array.isArray(val);
+    };
+    return Object.prototype.toString.call(val) === '[object Array]';
+  };
+
+  var isString = function(val) {
+    return typeof value == 'string' || Object.prototype.toString.call(val) === '[object String]';
+  };
+
+  var isNumber = function(val) {
+    return typeof val == 'number' || Object.prototype.toString.call(val) === '[object Number]';
+  };
+
+  var isBoolean = function(val) {
+    return val === true || val === false;
+  };
+
+  var decimalAdjust = function(type, value, exp) {
+    // If the exp is undefined or zero...
+    if (typeof exp === 'undefined' || +exp === 0) {
+      return Math[type](value);
+    }
+    value = +value;
+    exp = +exp;
+    // If the value is not a number or the exp is not an integer...
+    if (isNaN(value) || !(typeof exp === 'number' && exp % 1 === 0)) {
+      return NaN;
+    }
+    // Shift
+    value = value.toString().split('e');
+    value = Math[type](+(value[0] + 'e' + (value[1] ? (+value[1] - exp) : -exp)));
+    // Shift back
+    value = value.toString().split('e');
+    return +(value[0] + 'e' + (value[1] ? (+value[1] + exp) : exp));
+  }
+
+  var merge = function (dest, obj) {
+    var key, value;
+    for (key in obj) if (obj.hasOwnProperty(key)) {
+      value = obj[key];
+      if (isString(value) || isNumber(value) || isBoolean(value)) {
+        dest[key] = value;
+      } else {
+        if (dest[key] == null) dest[key] = {};
+        merge(dest[key], value);
+      }
+    }
+    return dest;
+  };
+
   // Set default days/months translations.
   var DATE = {
       day_names: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
@@ -83,7 +157,7 @@     // Set the current locale to `en`.
     , locale: "en"
     // Set the translation key separator.
     , defaultSeparator: "."
-    // Set the placeholder format. Accepts `{placeholder}}` and `%{placeholder}`.}
+    // Set the placeholder format. Accepts `{{placeholder}}` and `%{placeholder}`.
     , placeholder: /(?:\{\{|%\{)(.*?)(?:\}\}?)/gm
     // Set if engine should fallback to the default locale when a translation
     // is missing.
@@ -147,6 +221,12 @@       this.fallbacks = DEFAULT_OPTIONS.fallbacks;
 
     if (typeof(this.translations) === "undefined" && this.translations !== null)
       this.translations = DEFAULT_OPTIONS.translations;
+
+    if (typeof(this.missingBehaviour) === "undefined" && this.missingBehaviour !== null)
+      this.missingBehaviour = DEFAULT_OPTIONS.missingBehaviour;
+
+    if (typeof(this.missingTranslationPrefix) === "undefined" && this.missingTranslationPrefix !== null)
+      this.missingTranslationPrefix = DEFAULT_OPTIONS.missingTranslationPrefix;
   };
   I18n.initializeOptions();
 
@@ -176,7 +256,7 @@     if (typeof(result) === "function") {
       result = result(locale);
     }
 
-    if (result instanceof Array === false) {
+    if (isArray(result) === false) {
       result = [result];
     }
 
@@ -283,7 +363,6 @@
       if (!translations) {
         continue;
       }
-
       while (scopes.length) {
         translations = translations[scopes.shift()];
 
@@ -302,6 +381,75 @@       return options.defaultValue;
     }
   };
 
+  // lookup pluralization rule key into translations
+  I18n.pluralizationLookupWithoutFallback = function(count, locale, translations) {
+    var pluralizer = this.pluralization.get(locale)
+      , pluralizerKeys = pluralizer(count)
+      , pluralizerKey
+      , message;
+
+    if (isObject(translations)) {
+      while (pluralizerKeys.length) {
+        pluralizerKey = pluralizerKeys.shift();
+        if (this.isSet(translations[pluralizerKey])) {
+          message = translations[pluralizerKey];
+          break;
+        }
+      }
+    }
+
+    return message;
+  };
+
+  // Lookup dedicated to pluralization
+  I18n.pluralizationLookup = function(count, scope, options) {
+    options = this.prepareOptions(options);
+    var locales = this.locales.get(options.locale).slice()
+      , requestedLocale = locales[0]
+      , locale
+      , scopes
+      , translations
+      , message
+    ;
+    scope = this.getFullScope(scope, options);
+
+    while (locales.length) {
+      locale = locales.shift();
+      scopes = scope.split(this.defaultSeparator);
+      translations = this.translations[locale];
+
+      if (!translations) {
+        continue;
+      }
+
+      while (scopes.length) {
+        translations = translations[scopes.shift()];
+        if (!isObject(translations)) {
+          break;
+        }
+        if (scopes.length == 0) {
+          message = this.pluralizationLookupWithoutFallback(count, locale, translations);
+        }
+      }
+      if (message != null && message != undefined) {
+        break;
+      }
+    }
+
+    if (message == null || message == undefined) {
+      if (this.isSet(options.defaultValue)) {
+        if (isObject(options.defaultValue)) {
+          message = this.pluralizationLookupWithoutFallback(count, options.locale, options.defaultValue);
+        } else {
+          message = options.defaultValue;
+        }
+        translations = options.defaultValue;
+      }
+    }
+
+    return { message: message, translations: translations };
+  };
+
   // Rails changed the way the meridian is stored.
   // It started with `date.meridian` returning an array,
   // then it switched to `time.am` and `time.pm`.
@@ -381,6 +529,7 @@   // Translate the given scope with the provided options.
   I18n.translate = function(scope, options) {
     options = this.prepareOptions(options);
 
+    var copiedOptions = this.prepareOptions(options);
     var translationOptions = this.createTranslationOptions(scope, options);
 
     var translation;
@@ -405,8 +554,8 @@     }
 
     if (typeof(translation) === "string") {
       translation = this.interpolate(translation, options);
-    } else if (translation instanceof Object && this.isSet(options.count)) {
-      translation = this.pluralize(options.count, translation, options);
+    } else if (isObject(translation) && this.isSet(options.count)) {
+      translation = this.pluralize(options.count, scope, copiedOptions);
     }
 
     return translation;
@@ -435,9 +584,9 @@
       if (this.isSet(options[name])) {
         value = options[name].toString().replace(/\$/gm, "_#$#_");
       } else if (name in options) {
-        value = this.nullPlaceholder(placeholder, message);
+        value = this.nullPlaceholder(placeholder, message, options);
       } else {
-        value = this.missingPlaceholder(placeholder, message);
+        value = this.missingPlaceholder(placeholder, message, options);
       }
 
       regex = new RegExp(placeholder.replace(/\{/gm, "\\{").replace(/\}/gm, "\\}"));
@@ -452,32 +601,22 @@   // The pluralized translation may have other placeholders,
   // which will be retrieved from `options`.
   I18n.pluralize = function(count, scope, options) {
     options = this.prepareOptions(options);
-    var translations, pluralizer, keys, key, message;
-
-    if (scope instanceof Object) {
-      translations = scope;
-    } else {
-      translations = this.lookup(scope, options);
-    }
+    var pluralizer, message, result;
 
-    if (!translations) {
+    result = this.pluralizationLookup(count, scope, options);
+    if (result.translations == undefined || result.translations == null) {
       return this.missingTranslation(scope, options);
     }
 
-    pluralizer = this.pluralization.get(options.locale);
-    keys = pluralizer(count);
+    options.count = String(count);
 
-    while (keys.length) {
-      key = keys.shift();
-
-      if (this.isSet(translations[key])) {
-        message = translations[key];
-        break;
-      }
+    if (result.message != undefined && result.message != null) {
+      return this.interpolate(result.message, options);
     }
-
-    options.count = String(count);
-    return this.interpolate(message, options);
+    else {
+      pluralizer = this.pluralization.get(options.locale);
+      return this.missingTranslation(scope + '.' + pluralizer(count)[0], options);
+    }
   };
 
   // Return a missing translation message for the given parameters.
@@ -492,14 +631,15 @@           s.replace('_',' ').replace(/([a-z])([A-Z])/g,
           function(match, p1, p2) {return p1 + ' ' + p2.toLowerCase()} );
     }
 
+    var localeForTranslation = (options != null && options.locale != null) ? options.locale : this.currentLocale();
     var fullScope           = this.getFullScope(scope, options);
-    var fullScopeWithLocale = [this.currentLocale(), fullScope].join(this.defaultSeparator);
+    var fullScopeWithLocale = [localeForTranslation, fullScope].join(this.defaultSeparator);
 
     return '[missing "' + fullScopeWithLocale + '" translation]';
   };
 
   // Return a missing placeholder message for given parameters
-  I18n.missingPlaceholder = function(placeholder, message) {
+  I18n.missingPlaceholder = function(placeholder, message, options) {
     return "[missing " + placeholder + " value]";
   };
 
@@ -526,7 +666,7 @@       , NUMBER_FORMAT
     );
 
     var negative = number < 0
-      , string = Math.abs(number).toFixed(options.precision).toString()
+      , string = toFixed(Math.abs(number), options.precision).toString()
       , parts = string.split(".")
       , precision
       , buffer = []
@@ -728,6 +868,10 @@     }
 
     options = this.prepareOptions(options, DATE);
 
+    if (isNaN(date.getTime())) {
+      throw new Error('I18n.strftime() requires a valid date object, but received an invalid date.');
+    }
+
     var weekDay = date.getDay()
       , day = date.getDate()
       , year = date.getFullYear()
@@ -856,41 +1000,26 @@
     return scope;
   };
   /**
-   * Merge obj1 with obj2
-   * @param {Object} obj1 Default settings
-   * @param {Object} obj2 User obj2
+   * Merge obj1 with obj2 (shallow merge), without modifying inputs
+   * @param {Object} obj1
+   * @param {Object} obj2
    * @returns {Object} Merged values of obj1 and obj2
+   *
+   * In order to support ES3, `Object.prototype.hasOwnProperty.call` is used
+   * Idea is from:
+   * https://stackoverflow.com/questions/8157700/object-has-no-hasownproperty-method-i-e-its-undefined-ie8
    */
   I18n.extend = function ( obj1, obj2 ) {
-    var extended = {};
-    var prop;
-    for (prop in obj1) {
-      if (Object.prototype.hasOwnProperty.call(obj1, prop)) {
-        extended[prop] = obj1[prop];
-      }
+    if (typeof(obj1) === "undefined" && typeof(obj2) === "undefined") {
+      return {};
     }
-    for (prop in obj2) {
-      if (Object.prototype.hasOwnProperty.call(obj2, prop)) {
-        extended[prop] = obj2[prop];
-      }
-    }
-    return extended;
+    return merge(obj1, obj2);
   };
 
   // Set aliases, so we can save some typing.
   I18n.t = I18n.translate;
   I18n.l = I18n.localize;
   I18n.p = I18n.pluralize;
-
-  if ( typeof define === "function" && define.amd ) {
-    define(function() {
-      return I18n;
-    });
-  }
-
-  if ( typeof noGlobal === typeof undefined ) {
-    window.I18n = I18n;
-  }
 
   return I18n;
 }));