Nodejs Array Has hasItem(search)

Method Source Code

/*/*w ww .  ja  v a  2 s  . com*/
*   This software called - np - is a lightwight MVP Framework for building web applications and
*   was developed by Christian Peters
*
*   Copyright (C) 2016 Christian Peters
*
*   This program is free software: you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation, either version 3 of the License, or
*   (at your option) any later version.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*   Contact: Christian Peters <c.peters.eshop@gmail.com>
*/

/* Remove: indexOf is the correct call */
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;
    }
};

Related

1. 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;
   

2. 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;
   

3. hasContain(val)

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

4. hasItem(e)

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

5. hasItem(item)

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