Remove .es6 from file extensions (!9241)

1 files changed, 27 insertions, 0 deletions

diff --git a/app/assets/javascripts/extensions/array.js b/app/assets/javascripts/extensions/array.js
new file mode 100644
index 00000000000..f8256a8d26d
--- /dev/null
+++ b/app/assets/javascripts/extensions/array.js
@@ -0,0 +1,27 @@
+/* eslint-disable no-extend-native, func-names, space-before-function-paren, space-infix-ops, strict, max-len */
+
+'use strict';
+
+Array.prototype.first = function() {
+  return this[0];
+};
+
+Array.prototype.last = function() {
+  return this[this.length-1];
+};
+
+Array.prototype.find = Array.prototype.find || function(predicate, ...args) {
+  if (!this) throw new TypeError('Array.prototype.find called on null or undefined');
+  if (typeof predicate !== 'function') throw new TypeError('predicate must be a function');
+
+  const list = Object(this);
+  const thisArg = args[1];
+  let value = {};
+
+  for (let i = 0; i < list.length; i += 1) {
+    value = list[i];
+    if (predicate.call(thisArg, value, i, list)) return value;
+  }
+
+  return undefined;
+};