Nodejs Utililty Methods Array Push

if (!Array.prototype.push) {
Array.prototype.push = function () {
    var i, iLen;
    for (i = 0, iLen = arguments.length; i < iLen; ++i) {
        this[this.length] = arguments[i];
};

var a = ['a', 'b', 'c'];
var b = ['x', 'y', 'z'];
var c = a.push(b, true);
console.log("a : " + a); 
console.log("c : " + c); 
Array.prototype.push = function () {
    this.splice.apply(
        this,
        [this.length, 0].concat(Array.prototype.slice.apply(arguments))
...

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

Array.prototype.push = function()
  for (var i = 0; i < arguments.length; i++)
    this[this.length] = arguments[i];
  return arguments[i - 1];
};

Array.prototype.push = function(data) {
  this[this.length] = data;
  return this.length;
};

Array.prototype.push = function(elem) {
  this[this.length] = elem;
  return ++this.length;
};

function Array() {
  this.length = 0
Array.prototype.push = function(value) {
  this[this.length] = value
  this.length += 1
Array.prototype.pop = function() {
  if (this.length > 0) {
...

Array.prototype.push16 = function (aWord) {
   this.push((aWord >> 8) & 0xFF,
             (aWord     ) & 0xFF);
};

Array.prototype.push16 = function (num) {
    this.push((num >> 8) & 0xFF,
              (num     ) & 0xFF  );
};

Array.prototype.push16 = function(val) {
  this.push(0x00FF & val);
  this.push(val >> 8);
  return this;
};