Array.prototype.push about js-challenges HOT 2 OPEN

Array.prototype.Mypush = function(){
    var args = [...arguments]
    args.map(item => {
        this[this.length] = item;
    })
    return this.length;
}

Array.prototype.push = function() {
  var itemsToAdd = arguments.length;
  var len = this.length;
  for (var i = 0; i < itemsToAdd; i++) {
    this[len + i] = arguments[i];
  }
  return this.length;
};