Sub class array

myArray.js

function _bindArrayMethod(name, obj) {
  obj.prototype[name] = function () {
    return Array.prototype[name].apply(this, arguments);
  };
}

function subClassArray(obj) {
  var index;
  for (index = 0; index < methods.length; index++) {
    _bindArrayMethod(methods[index], obj);
  }
  return obj;
}

function MyArray(array) {
  this.push.apply(this, array);
}

subClassArray(MyArray);
MyArray.prototype.length = 0;