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rOACCT/node_modules/core-js/modules/es.array.iterator.js
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es.array.iterator.js
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			'use strict';
			var toIndexedObject = require('../internals/to-indexed-object');
			var addToUnscopables = require('../internals/add-to-unscopables');
			var Iterators = require('../internals/iterators');
			var InternalStateModule = require('../internals/internal-state');
			var defineProperty = require('../internals/object-define-property').f;
			var defineIterator = require('../internals/iterator-define');
			var createIterResultObject = require('../internals/create-iter-result-object');
			var IS_PURE = require('../internals/is-pure');
			var DESCRIPTORS = require('../internals/descriptors');

			var ARRAY_ITERATOR = 'Array Iterator';
			var setInternalState = InternalStateModule.set;
			var getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);

			// `Array.prototype.entries` method
			// https://tc39.es/ecma262/#sec-array.prototype.entries
			// `Array.prototype.keys` method
			// https://tc39.es/ecma262/#sec-array.prototype.keys
			// `Array.prototype.values` method
			// https://tc39.es/ecma262/#sec-array.prototype.values
			// `Array.prototype[@@iterator]` method
			// https://tc39.es/ecma262/#sec-array.prototype-@@iterator
			// `CreateArrayIterator` internal method
			// https://tc39.es/ecma262/#sec-createarrayiterator
			module.exports = defineIterator(Array, 'Array', function (iterated, kind) {
			setInternalState(this, {
			type: ARRAY_ITERATOR,
			target: toIndexedObject(iterated), // target
			index: 0, // next index
			kind: kind // kind
			});
			// `%ArrayIteratorPrototype%.next` method
			// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
			}, function () {
			var state = getInternalState(this);
			var target = state.target;
			var kind = state.kind;
			var index = state.index++;
			if (!target \|\| index >= target.length) {
			state.target = undefined;
			return createIterResultObject(undefined, true);
			}
			if (kind == 'keys') return createIterResultObject(index, false);
			if (kind == 'values') return createIterResultObject(target[index], false);
			return createIterResultObject([index, target[index]], false);
			}, 'values');

			// argumentsList[@@iterator] is %ArrayProto_values%
			// https://tc39.es/ecma262/#sec-createunmappedargumentsobject
			// https://tc39.es/ecma262/#sec-createmappedargumentsobject
			var values = Iterators.Arguments = Iterators.Array;

			// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
			addToUnscopables('keys');
			addToUnscopables('values');
			addToUnscopables('entries');

			// V8 ~ Chrome 45- bug
			if (!IS_PURE && DESCRIPTORS && values.name !== 'values') try {
			defineProperty(values, 'name', { value: 'values' });
			} catch (error) { /* empty */ }