--- /dev/null
+var bind = require('../internals/function-bind-context');
+var IndexedObject = require('../internals/indexed-object');
+var toObject = require('../internals/to-object');
+var toLength = require('../internals/to-length');
+var arraySpeciesCreate = require('../internals/array-species-create');
+
+var push = [].push;
+
+// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation
+var createMethod = function (TYPE) {
+ var IS_MAP = TYPE == 1;
+ var IS_FILTER = TYPE == 2;
+ var IS_SOME = TYPE == 3;
+ var IS_EVERY = TYPE == 4;
+ var IS_FIND_INDEX = TYPE == 6;
+ var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+ return function ($this, callbackfn, that, specificCreate) {
+ var O = toObject($this);
+ var self = IndexedObject(O);
+ var boundFunction = bind(callbackfn, that, 3);
+ var length = toLength(self.length);
+ var index = 0;
+ var create = specificCreate || arraySpeciesCreate;
+ var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;
+ var value, result;
+ for (;length > index; index++) if (NO_HOLES || index in self) {
+ value = self[index];
+ result = boundFunction(value, index, O);
+ if (TYPE) {
+ if (IS_MAP) target[index] = result; // map
+ else if (result) switch (TYPE) {
+ case 3: return true; // some
+ case 5: return value; // find
+ case 6: return index; // findIndex
+ case 2: push.call(target, value); // filter
+ } else if (IS_EVERY) return false; // every
+ }
+ }
+ return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+ };
+};
+
+module.exports = {
+ // `Array.prototype.forEach` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
+ forEach: createMethod(0),
+ // `Array.prototype.map` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.map
+ map: createMethod(1),
+ // `Array.prototype.filter` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.filter
+ filter: createMethod(2),
+ // `Array.prototype.some` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.some
+ some: createMethod(3),
+ // `Array.prototype.every` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.every
+ every: createMethod(4),
+ // `Array.prototype.find` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.find
+ find: createMethod(5),
+ // `Array.prototype.findIndex` method
+ // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
+ findIndex: createMethod(6)
+};