findKey: function findKey(callbackfn /* , thisArg */) {
var map = anObject(this);
var iterator = getMapIterator(map);
- var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+ var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
return iterate(iterator, function (key, value, stop) {
if (boundFunction(value, key, map)) return stop(key);
}, { AS_ENTRIES: true, IS_ITERATOR: true, INTERRUPTED: true }).result;