--- /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');
+
+// `Array.prototype.{ findLast, findLastIndex }` methods implementation
+var createMethod = function (TYPE) {
+ var IS_FIND_INDEX = TYPE == 6;
+ return function ($this, callbackfn, that) {
+ var O = toObject($this);
+ var self = IndexedObject(O);
+ var boundFunction = bind(callbackfn, that, 3);
+ var index = toLength(self.length);
+ var value, result;
+ while (index-- > 0) {
+ value = self[index];
+ result = boundFunction(value, index, O);
+ if (result) switch (TYPE) {
+ case 5: return value; // find
+ case 6: return index; // findIndex
+ }
+ }
+ return IS_FIND_INDEX ? -1 : undefined;
+ };
+};
+
+module.exports = {
+ // `Array.prototype.findLast` method
+ // https://github.com/tc39/proposal-array-find-from-last
+ findLast: createMethod(5),
+ // `Array.prototype.findLastIndex` method
+ // https://github.com/tc39/proposal-array-find-from-last
+ findLastIndex: createMethod(6)
+};