Nodejs Array Index indexOf(o)

Method Source Code

Array.prototype.indexOf = function(o){
   for(var i = 0, len = this.length; i < len; i++){
      if(this[i] === o){
         return i;
      }//  w w w . j  a v a  2  s . c  om
   }
};

Related

1. indexOf(given, strict)

   Array.prototype.indexOf = function(given, strict) {
     var result = null;
     this.each(function(elem, idx) {
       if (strict) {
         if (elem === given) {
           result = idx;
           return false;
       else {
         if (elem == given) {
           result = idx;
           return false;
     })
     return result;
   

2. indexOf(item)

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

3. indexOf(item)

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

4. 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;
   };}
   

5. 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;
   };
   

6. indexOf(obj)

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

7. indexOf(obj)

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

8. indexOf(obj)

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

9. 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;
   };
   ...