Nodejs Array Contain contains(value)

Method Source Code

// This file is part of Ambience Stage
// Copyright 2012-2013 Jakob Kallin
// License: GNU GPL (http://www.gnu.org/licenses/gpl-3.0.txt)

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

Array.prototype.remove = function(value) {
   var index = this.indexOf(value);
   if ( index !== -1 ) {
      this.splice(index, 1);//  w  w  w  .j  a v a 2  s  .c o m
   }
};

Array.prototype.clear = function() {
   this.splice(0);
};

Array.prototype.first = function(predicate) {
   for ( var i = 0; i < this.length; i++ ) {
      var value = this[i];
      if ( predicate(value) ) {
         return value;
      }
   }
   return null;
};

Array.prototype.randomIndex = function() {
   return Math.floor(Math.random() * this.length);
};

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

String.prototype.startsWith = function(prefix) {
   return this.indexOf(prefix) === 0;
};

String.prototype.endsWith = function(suffix) {
   return this.lastIndexOf(suffix) === this.length - suffix.length;
};

Related

1. contains(value)

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

2. contains(value)

   Array.prototype.contains = function (value){
       return this.indexOf(value)>=0
   };
   

3. contains(value)

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

4. contains(value)

   Array.prototype.contains = function(value) {
       return (this.indexOf(value) > -1);
   

5. contains(value)

   "use strict";
   Array.prototype.contains = function(value){
     var n = this.length
     for (var i = 0; i < n; i++){
       if (this[i] == value) return true
     return false
   

6. contains(value)

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

7. contains(what)

   Array.prototype.contains = function (what) {
     var contains = false;
     if (typeof what !== 'function') {
       this.forEach(function (item) {
         if (contains) return;
         contains = (item === what);
       });
       return contains;
     this.forEach(function (item) {
       if (contains) return;
       contains = what(item);
     });
     return contains;
   };
   

8. contains(x)

   Array.prototype.contains=function(x){
    for(i in this){
      if((x.city==this[i].city || x.firstName==this[i].firstname || x.lastName==this[i].lastname))
        return true;
    return false;
   

9. contains(x)

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