Nodejs Array Index indexOf(s)

Method Source Code

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

   return -1;/*from w  w w. jav  a 2 s.com*/
};

Related

1. 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;
   };
   

2. 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;
   };
   

3. 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;
   

4. indexOf(obj, start)

   'use strict';
   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(object)

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

6. 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])  
   ...
   

7. 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) {
   ...
   

8. indexOf(searchElement)

   Array.prototype.indexOf = function(searchElement) {
     "use strict";
     if (this === void 0 || this === null) {
       throw new TypeError();
     var t = Object(this);
     var len = t.length >>> 0;
     if (len === 0) {return -1;}
     var n = 0;
   ...
   

9. indexOf(searchElement, fromIndex)

   Array.prototype.indexOf = function(searchElement, fromIndex) {
     if (!fromIndex || !isFinite(fromIndex)) {
       fromIndex = 0;
     for (var i = fromIndex, l = this.length; i < l; ++i) {
       if (this.hasOwnProperty(i) && this[i] === searchElement) {
         return i;
     return -1;