Nodejs Array Index indexOf(obj)

Method Source Code

Array.prototype.indexOf = function (obj) {
    for (i = 0; i < this.length; i++) {
   if (obj === this[i]) {
       return i/*ww w  .  j  av  a  2 s  .  com*/
   }
    }
    return -1;
};

Related

1. indexOf(item,from)

   if(!Array.indexOf) {
   Array.prototype.indexOf = function(item,from)
     if(!from)
       from = 0;
     for(var i=from; i<this.length; i++) {
       if(this[i] === item)
         return i;
     return -1;
   };}
   

2. indexOf(needle)

   Array.prototype.indexOf = Array.indexOf || function(needle) {
     for(var i = 0; i < this.length; i++) {
       if(this[i] == needle) {
         return i;
     return -1;
   };
   

3. indexOf(o)

   Array.prototype.indexOf = function(o){
     for(var i = 0, len = this.length; i < len; i++){
       if(this[i] === o){
         return i;
   };
   

4. indexOf(obj)

   Array.prototype.indexOf = function(obj) {
     for (var i = 0; i < this.length; i++) {
       if (this[i] == obj)
         return i;
     return -1;
   };
   

5. indexOf(obj)

   Array.prototype.indexOf = function (obj) {
       for (var i = 0; i < this.length; i++) {
           if (this[i] == obj) {
               return i;
       return -1;
   };
   

6. indexOf(obj)

   Array.prototype.indexOf = function(obj){
     var l = this.length;
     for(var i=0; i<l; i++){
       if(this[i] == obj){
         return i;
     return -1;
   };
   ...
   

7. indexOf(obj)

   var os = require('os');
   Array.prototype.indexOf = function(obj) {
     for (var i = 0; i < this.length; i++) {
       if (this[i] == obj)
         return i;
     return -1;
   Array.prototype.has = function(obj) {
   ...
   

8. indexOf(obj)

   Array.prototype.indexOf=function(obj){
     var result=-1;
     for (var i=0;i<this.length;i++){
       if (this[i]==obj){
         result=i;
         break;
     return result;
   ...
   

9. indexOf(obj)

   if(!Array.indexOf){ 
     Array.prototype.indexOf = function(obj){
       for(var i=0; i<this.length; i++){
         if(this[i]==obj){
           return i;
       return -1;