Nodejs Array Index indexOf(obj, fromIndex)

Here you can find the source of indexOf(obj, fromIndex)

Method Source Code

/** Setup indexOf and contains methods **/
if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (obj, fromIndex) {
        if (fromIndex == null) {
            fromIndex = 0;// w ww .  ja  v  a2 s  .co  m
        } 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;
        }
        return -1;
    };
}

Array.prototype.contains = function (obj) {
    return (this.indexOf(obj) != -1);
};

Array.prototype.removeAll = function(key){
    var index = this.indexOf(key);

    if(index === -1) return;

    this.splice(index, 1);
    this.removeAll(key);
};

Related

  1. indexOf(obj)
    Array.prototype.indexOf = function(obj){
      var l = this.length;
      for(var i=0; i<l; i++){
        if(this[i] == obj){
          return i;
      return -1;
    };
    ...
    
  2. indexOf(obj)
    var os = require('os');
    Array.prototype.indexOf = function(obj) {
      for (var i = 0; i < this.length; i++) {
        if (this[i] == obj)
          return i;
      return -1;
    Array.prototype.has = function(obj) {
    ...
    
  3. indexOf(obj)
    Array.prototype.indexOf=function(obj){
      var result=-1;
      for (var i=0;i<this.length;i++){
        if (this[i]==obj){
          result=i;
          break;
      return result;
    ...
    
  4. indexOf(obj)
    if(!Array.indexOf){ 
      Array.prototype.indexOf = function(obj){
        for(var i=0; i<this.length; i++){
          if(this[i]==obj){
            return i;
        return -1;
    
  5. indexOf(obj)
    Array.prototype.indexOf = function(obj) {
      for (var i = 0; i < this.length; i++) {
        if (obj == this[i])
          return i;
      return -1;
    };
    
  6. 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;
    };
    
  7. 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;
    };
    
  8. 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;
    
  9. 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;