Nodejs Array Index indexOf(substr,start)

Method Source Code

Array.prototype.indexOf=function(substr,start)
{
   var ta,rt,d='\0';
   if(start!=null){ta=this.slice(start);rt=start;}else{ta=this;rt=0;}
   var str=d+ta.join(d)+d,t=str.indexOf(d+substr+d);
   if(t==-1)return -1;rt+=str.slice(0,t).replace(/[^\0]/g,'').length;
   return rt;/*  w  w  w  .  j ava  2s  .co  m*/
}

Related

1. 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) {
   ...
   

2. 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;
   ...
   

3. 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;
   

4. indexOf(showMe)

   Array.prototype.indexOf = function(showMe){
       for(identification in this){
           if(this[identification] == showMe){return identification}
       return undefined
   Array.prototype.max = function(){
     var max = 0;
     for(num in this){
   ...
   

5. indexOf(src, form)

   'use strict';
   var arr = [
       'a', 'b', 'c', 'd', '1', 1, '0'
   ]
   console.log(arr.indexOf('b'));
   console.log(arr.indexOf(1, 3));
   console.log(arr.indexOf(13, 3));
   console.log(arr.indexOf('d'));
   Array.prototype.indexOf = function(src, form) {
   ...
   

6. indexOf(v,b)

   Array.prototype.indexOf = function(v,b){
       var idx=-1;
     if(b===true && typeof(v)=="function"){
       for (var i=0,l=this.length;i<l;i++) {
         if(v(this[i])){idx=i; break;}
     } else {
       for (var i=0,l=this.length;i<l;i++) {
         if(this[i]===v){idx=i; break;}
   ...
   

7. indexOf(val)

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

8. indexOf(val)

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

9. 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;