Nodejs Array Index indexOf(item,from)

Method Source Code

// Add indexOf function if browser does not support it
if(!Array.indexOf) {
Array.prototype.indexOf = function(item,from)
{
   if(!from)/*w w  w .  ja  v a  2 s  .com*/
      from = 0;
   for(var i=from; i<this.length; i++) {
      if(this[i] === item)
         return i;
   }
   return -1;
};}

Related

1. indexOf(elt /*, from*/)

   Array.prototype.indexOf = function(elt )
       var len = this.length;
       var from = Number(arguments[1]) || 0;
       from = (from < 0)
            ? Math.ceil(from)
            : Math.floor(from);
       if (from < 0)
         from += len;
   ...
   

2. indexOf(elt /*, from*/)

   Array.prototype.indexOf = Array.prototype.indexOf || function(elt ) {
       var len = this.length >>> 0;
       var from = Number(arguments[1]) || 0;
       from = (from < 0)
           ? Math.ceil(from)
           : Math.floor(from);
       if (from < 0) {
           from += len;
       for (; from < len; from++) {
           if (from in this &&
               this[from] === elt) {
               return from;
       return -1;
   };
   

3. 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;
   

4. indexOf(item)

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

5. 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;
   ...
   

6. 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;
   };
   

7. indexOf(o)

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

8. indexOf(obj)

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

9. indexOf(obj)

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