array-iteration-from-last.js
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array-iteration-from-last.js
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	var bind = require('../internals/function-bind-context');
	var IndexedObject = require('../internals/indexed-object');
	var toObject = require('../internals/to-object');
	var lengthOfArrayLike = require('../internals/length-of-array-like');

	// `Array.prototype.{ findLast, findLastIndex }` methods implementation
	var createMethod = function (TYPE) {
	var IS_FIND_LAST_INDEX = TYPE == 1;
	return function ($this, callbackfn, that) {
	var O = toObject($this);
	var self = IndexedObject(O);
	var boundFunction = bind(callbackfn, that);
	var index = lengthOfArrayLike(self);
	var value, result;
	while (index-- > 0) {
	value = self[index];
	result = boundFunction(value, index, O);
	if (result) switch (TYPE) {
	case 0: return value; // findLast
	case 1: return index; // findLastIndex
	}
	}
	return IS_FIND_LAST_INDEX ? -1 : undefined;
	};
	};

	module.exports = {
	// `Array.prototype.findLast` method
	// https://github.com/tc39/proposal-array-find-from-last
	findLast: createMethod(0),
	// `Array.prototype.findLastIndex` method
	// https://github.com/tc39/proposal-array-find-from-last
	findLastIndex: createMethod(1)
	};