Nodejs Array Has hasItem(item)

Method Source Code

Array.prototype.hasItem = function(item) {
  return this.indexOf(item) < 0 ? true : false;
}

Related

1. has(value)

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

2. has(value)

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

3. has(value, defaultValue)

   Array.prototype.has = function(value, defaultValue) {
     for (i = 0; i < this.length; i++)
       if (this[i].toLowerCase() == value) return this[i];
     return defaultValue;
   

4. hasContain(val)

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

5. hasItem(e)

   Array.prototype.hasItem = function(e)
       for(i=0;i<this.length && this[i]!=e;i++);
       return i;    
   

6. hasItem(search)

   Array.prototype.hasItem = function (search) {
       var i, l;
       if( this instanceof Array ) {
           l   = this.length;
           for (i=0; i<l; i++) { if(this[i] === search) { return i; } }
           return false;
       } else {
           return this;
   };