Array.prototype.push

[Sunny Fu]

Array.prototype.myPush = function (...arg) {
  for (let i = 0; i < arg.length; i++) {
    this[this.length] = arg[i];
  }        
  return this.length;
};

[ychch]

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

[kangkang123269]

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;
};