Nodejs Array Contain contains(element)

Method Source Code

// Copyright (C) 2014 Rob Colbert <rob.isConnected@gmail.com>
// License: MIT//w  ww.  j  a v  a 2  s . c om

'use strict';

/*
 * When working in Pulsar, for convenience, you may:
 *
 * var test = [ 1, 2, 3 ];
 * if (test.contains(2)) {
 * }
 */

Array.prototype.contains = function (element) { 
   return (this.indexOf(element) !== -1); 
};

Related

1. contains(element)

   Array.prototype.contains = function (element) {
      for (i in this)
          if (this[i] == element) return true;
      return false;
   

2. contains(element)

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

3. contains(element)

   Array.prototype.contains = function(element) {
       var i = this.length;
       while(i--) {
           if (_.isEqual(this[i], element)) {
               return true;
       return false;
   

4. contains(element)

   Array.prototype.contains = function(element) {
       return this.indexOf(element) != -1;
   };
   Object.prototype.toString = function() {
       try {
           return JSON.stringify(this);
       } catch(circular_structure) {
           return '[object Object]';
   };
   

5. contains(element)

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

6. contains(element)

   Array.prototype.contains = function(element) {
       return this.indexOf(element) != -1;
   };
   

7. contains(element)

   Array.prototype.contains = function(element) {
     return this.indexOf(element) != -1;
   };
   

8. contains(element)

   Array.prototype.contains = function(element) {
     return (-1 !== this.indexOf(element))
   

9. contains(element)

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