Nodejs Array Index indexOf(obj)

Method Source Code

if(!Array.indexOf){ //some lower versions of IE doesn't have indexOf
   Array.prototype.indexOf = function(obj){
      for(var i=0; i<this.length; i++){
         if(this[i]==obj){
            return i;
         }//from   w  ww  .  ja  va 2  s  .  c o m
      }
      return -1;
   }
}

Related

1. indexOf(obj)

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

2. indexOf(obj)

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

3. 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;
   };
   ...
   

4. 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) {
   ...
   

5. 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;
   ...
   

6. indexOf(obj)

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

7. indexOf(obj, fromIndex)

   if (!Array.prototype.indexOf) {
       Array.prototype.indexOf = function (obj, fromIndex) {
           if (fromIndex == null) {
               fromIndex = 0;
           } else if (fromIndex < 0) {
               fromIndex = Math.max(0, this.length + fromIndex);
           for (var i = fromIndex, j = this.length; i < j; i++) {
               if (this[i] === obj) return i;
   ...
   

8. indexOf(obj, fromIndex)

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

9. indexOf(obj, start)

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