Nodejs Utililty Methods Array Push

Array.prototype.pushAll = function(items) {
    if (!Array.isArray(items)) {
        throw new TypeError("Argument must be an array.");
    return this.push(...items);
};

Array.prototype.pushAll = function (items) {
    if (!Array.isArray(items)) {
        throw new TypeError("Argument must be an array.");
    return this.push(...items);
};

Array.prototype.pushAll = function (iterable) {
  for (const value of iterable) {
    this.push(value)

Array.prototype.pushAll = function (x) {
  for (var i = 0; i < x.length; i += 1) {
    this.push(x[i]);
};

Array.prototype.pushArray = function(arr) {
    if (arr) {
        for (var i = arr.length - 1; i >= 0; --i)
            this.push(arr[i]);

Array.prototype.pushArray = function(arr) {
    this.push.apply(this, arr);
};

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

Array.prototype.pushArray = function(arr) {
    this.push.apply(this, arr);
};

Array.prototype.push_all = function(array) {
    for (var index in array) {
        this.push(array[index]);

Array.prototype.pushMe = function (num) {
  this[this.length] = num;
  return this;
};