Remove monkey-patched Array.prototype.first() and last() methods

app/assets/javascripts/ajax_loading_spinner.js

@@ -10,7 +10,7 @@ class AjaxLoadingSpinner {
     e.target.setAttribute('disabled', '');
     const iconElement = e.target.querySelector('i');
     // get first fa- icon
-    const originalIcon = iconElement.className.match(/(fa-)([^\s]+)/g).first();
+    const originalIcon = iconElement.className.match(/(fa-)([^\s]+)/g)[0];
     iconElement.dataset.icon = originalIcon;
     AjaxLoadingSpinner.toggleLoadingIcon(iconElement);
     $(e.target).off('ajax:beforeSend', AjaxLoadingSpinner.ajaxBeforeSend);

app/assets/javascripts/cycle_analytics/cycle_analytics_bundle.js

@@ -92,7 +92,7 @@ $(() => {
           });
       },
       selectDefaultStage() {
-        const stage = this.state.stages.first();
+        const stage = this.state.stages[0];
         this.selectStage(stage);
       },
       selectStage(stage) {

app/assets/javascripts/dispatcher.js

@@ -504,7 +504,7 @@ import GpgBadges from './gpg_badges';
           new gl.DueDateSelectors();
           break;
       }
-      switch (path.first()) {
+      switch (path[0]) {
         case 'sessions':
         case 'omniauth_callbacks':
           if (!gon.u2f) break;

app/assets/javascripts/dropzone_input.js

@@ -217,7 +217,7 @@ window.DropzoneInput = (function() {
         value = e.clipboardData.getData('text/plain');
       }
       value = value.split("\r");
-      return value.first();
+      return value[0];
     };
 
     const showSpinner = function(e) {

app/assets/javascripts/extensions/array.js

-// TODO: remove this
-
-// eslint-disable-next-line no-extend-native
-Array.prototype.first = function first() {
-  return this[0];
-};
-
-// eslint-disable-next-line no-extend-native
-Array.prototype.last = function last() {
-  return this[this.length - 1];
-};

app/assets/javascripts/filtered_search/dropdown_utils.js

@@ -123,11 +123,11 @@ class DropdownUtils {
 
     if (!allowMultiple && itemInExistingTokens) {
       updatedItem.droplab_hidden = true;
-    } else if (!lastKey || searchInput.split('').last() === ' ') {
+    } else if (!lastKey || _.last(searchInput.split('')) === ' ') {
       updatedItem.droplab_hidden = false;
     } else if (lastKey) {
       const split = lastKey.split(':');
-      const tokenName = split[0].split(' ').last();
+      const tokenName = _.last(split[0].split(' '));
 
       const match = updatedItem.hint.indexOf(tokenName.toLowerCase()) === -1;
       updatedItem.droplab_hidden = tokenName ? match : false;

app/assets/javascripts/filtered_search/filtered_search_dropdown_manager.js

@@ -167,7 +167,7 @@ class FilteredSearchDropdownManager {
       // Eg. token = 'label:'
 
       const split = lastToken.split(':');
-      const dropdownName = split[0].split(' ').last();
+      const dropdownName = _.last(split[0].split(' '));
       this.loadDropdown(split.length > 1 ? dropdownName : '');
     } else if (lastToken) {
       // Token has been initialized into an object because it has a value

app/assets/javascripts/filtered_search/filtered_search_manager.js

@@ -367,7 +367,7 @@ class FilteredSearchManager {
       const fragments = searchToken.split(':');
       if (fragments.length > 1) {
         const inputValues = fragments[0].split(' ');
-        const tokenKey = inputValues.last();
+        const tokenKey = _.last(inputValues);
 
         if (inputValues.length > 1) {
           inputValues.pop();

app/assets/javascripts/main.js

@@ -16,9 +16,6 @@ import 'mousetrap';
 import 'mousetrap/plugins/pause/mousetrap-pause';
 import 'vendor/fuzzaldrin-plus';
 
-// extensions
-import './extensions/array';
-
 // expose common libraries as globals (TODO: remove these)
 window.jQuery = jQuery;
 window.$ = jQuery;

spec/javascripts/abuse_reports_spec.js

@@ -6,10 +6,10 @@ import '~/abuse_reports';
     const FIXTURE = 'abuse_reports/abuse_reports_list.html.raw';
     const MAX_MESSAGE_LENGTH = 500;
 
-    let messages;
+    let $messages;
 
     const assertMaxLength = $message => expect($message.text().length).toEqual(MAX_MESSAGE_LENGTH);
-    const findMessage = searchText => messages.filter(
+    const findMessage = searchText => $messages.filter(
       (index, element) => element.innerText.indexOf(searchText) > -1,
     ).first();
 
@@ -18,7 +18,7 @@ import '~/abuse_reports';
     beforeEach(function () {
       loadFixtures(FIXTURE);
       this.abuseReports = new global.AbuseReports();
-      messages = $('.abuse-reports .message');
+      $messages = $('.abuse-reports .message');
     });
 
     it('should truncate long messages', () => {

spec/javascripts/ajax_loading_spinner_spec.js

-import '~/extensions/array';
 import 'jquery';
 import 'jquery-ujs';
 import '~/ajax_loading_spinner';

spec/javascripts/extensions/array_spec.js

-/* eslint-disable space-before-function-paren, no-var */
-
-import '~/extensions/array';
-
-(function() {
-  describe('Array extensions', function() {
-    describe('first', function() {
-      return it('returns the first item', function() {
-        var arr;
-        arr = [0, 1, 2, 3, 4, 5];
-        return expect(arr.first()).toBe(0);
-      });
-    });
-    describe('last', function() {
-      return it('returns the last item', function() {
-        var arr;
-        arr = [0, 1, 2, 3, 4, 5];
-        return expect(arr.last()).toBe(5);
-      });
-    });
-  });
-}).call(window);

spec/javascripts/filtered_search/dropdown_utils_spec.js

-import '~/extensions/array';
 import '~/filtered_search/dropdown_utils';
 import '~/filtered_search/filtered_search_tokenizer';
 import '~/filtered_search/filtered_search_dropdown_manager';

spec/javascripts/filtered_search/filtered_search_dropdown_manager_spec.js

-import '~/extensions/array';
 import '~/filtered_search/filtered_search_visual_tokens';
 import '~/filtered_search/filtered_search_tokenizer';
 import '~/filtered_search/filtered_search_dropdown_manager';

spec/javascripts/filtered_search/filtered_search_token_keys_spec.js

-import '~/extensions/array';
 import '~/filtered_search/filtered_search_token_keys';
 
 describe('Filtered Search Token Keys', () => {

spec/javascripts/filtered_search/filtered_search_tokenizer_spec.js

-import '~/extensions/array';
 import '~/filtered_search/filtered_search_token_keys';
 import '~/filtered_search/filtered_search_tokenizer';