Nodejs Array Index indexOf(obj, start)

Method Source Code

'use strict';/* w  w w .  j  ava2  s.c o m*/

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;
}

Related

1. indexOf(obj)

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

2. 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;
   ...
   

3. 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;
   };
   

4. 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;
   };
   

5. 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;
   

6. indexOf(object)

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

7. indexOf(s)

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

8. indexOf(s)

   Array.prototype.indexOf = function(s) {
     if(undefined!=s.position){
       for (var i = 0; i < this.length; i++) {  
             if (s.position == this[i].position)  
                 return i;  
     }else{
       for (var i = 0; i < this.length; i++) {  
             if (s == this[i])  
   ...
   

9. indexOf(searchElement /*, fromIndex */)

   if (!Array.prototype.indexOf) {
     Array.prototype.indexOf = function (searchElement ) {
       'use strict';
       if (this == null) {
         throw new TypeError();
       var n, k, t = Object(this),
         len = t.length >>> 0;
       if (len === 0) {
   ...