Nodejs Utililty Methods Array In

Array.prototype.in = function(ele) {
  for (var i=0; i<this.length; i++) {
    if (this[i] == ele) {
      return true;
  return false;

Array.prototype.in = function(elementToFind) {
  for(var i = 0 ; i < this.length ; i++) {
    if(this[i] === elementToFind) {
      return true;
  return false;
};

Array.prototype.inArr = function (item){
    for (var i = 0; i < this.length; i++){
        if(this[i] === item){
            return true;

Array.prototype.inArray = function() {
    for(var j in this) {
        if(this[j] == arguments[0]) {
            return true;
    return false;

Array.prototype.inArray = function()
  for (var j in this) { 
    if (this[j] == arguments[0]) { 
      return true;
  return false;     

Array.prototype.inArray = function(comparer) { 
    for(var i=0; i < this.length; i++) { 
        if(comparer(this[i])) return true; 
    return false; 
};

Array.prototype.inArray = function(comparer) { 
    for(var i=0; i < this.length; i++) { 
        if(comparer(this[i])) return true; 
    return false; 
};

Array.prototype.inArray = function(comparer) { 
    for(var i=0; i < this.length; i++) { 
        if(comparer(this[i])) return true; 
    return false; 
};

Array.prototype.inArray = function(comparer) {
  for (var i = 0; i < this.length; i++) {
    if (comparer(this[i])) return true;
  return false;
};
Array.prototype.pushIfNotExist = function(element, comparer) {
  if (!this.inArray(comparer)) {
    this.push(element);
...

Array.prototype.inArray = function(comparer) { 
    for(var i=0; i < this.length; i++) { 
        if(comparer(this[i])) return true; 
    return false; 
};