realinit

'use strict';

/*****************NATIVE forEACH*********************/

Array.prototype.myEach = function(callback) {
    for (var i = 0; i < this.length; i++)
        callback(this[i], i, this);
};

//tests

realinit

function createAndInitialize2DArray(size) {
  // catch a bug & fix me!
  var defaultValue = 0;
  var twoDimensionalArray = [];

  function initOneDArray() {
    var row = [];
    for (var i = 0; i < size; i++) {
      row.push(defaultValue);
    }

realinit

function retry(isDone, next) {
    var current_trial = 0, max_retry = 50, interval = 10, is_timeout = false;
    var id = window.setInterval(
        function() {
            if (isDone()) {
                window.clearInterval(id);
                next(is_timeout);
            }
            if (current_trial++ > max_retry) {
                window.clearInterval(id);