Nodejs Array Index indexOf(value)

Method Source Code

Array.prototype.indexOf = function (value) {   
   for(var i=0; i<this.length; i++) {
      if(this[i] === value) {
         return i;
      }//from  w  w w.j a v  a2 s . c  om
   }
   return -1;
}

Related

1. indexOf(val)

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

2. indexOf(val)

   Array.prototype.indexOf = function(val){
     var arrayVal = this;
     for(var i = 0 ; i < arrayVal.length; i++){
       if(arrayVal[i] == val){
         return 4;
     return -1;
   

3. indexOf(val)

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

4. indexOf(value)

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

5. indexOf(value)

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

6. indexOf(value, begin, strict)

   Array.prototype.indexOf = function(value, begin, strict)
     for(var i = +begin || 0; i < this.length; i++)
       if(this[i] === value || strict && this[i] == value)
         return i;
     return -1;
   };
   

7. indexOf(what, i)

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

8. index(val)

   Array.prototype.index = function(val) {
     for(var i = 0, l = this.length; i < l; i++) {
       if(this[i] == val) return i;
     return null;
   };
   

9. index(val)

   "use strict";
   Array.prototype.index = function(val) {
     for(var i = 0, l = this.length; i < l; i++) {
       if(this[i] == val) return i;
     return null;
   };