Nodejs Array Index indexOf(el/*, from*/)

Method Source Code

// From MDC: Augment Array.indexOf if it's missing (harmless)
Array.prototype.indexOf = Array.prototype.indexOf || function(el/*, from*/) {

   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] === el)) {
         return from;
      }//  w w  w . ja  va  2  s  . c  om
   }

   return -1;

};

// 'hi there'.capitalize(); // returns "Hi There".
String.prototype.capitalize = function() {
   return this.replace(/\w+/g, function(str) {
      return (str.charAt(0).toUpperCase() + str.substr(1));
   });
};

// ' foo '.trim(); // returns "foo".
String.prototype.trim = function() {
   return this.replace(/^\s+|\s+$/g, '');
};

indexOf( value )

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

indexOf()

Object.create = Object.create ||
function create(o) {
    "use strict";
    function F() {}
    F.prototype = o;
    return new F();
};
Object.getPrototypeOf = Object.getPrototypeOf ||
function getPrototypeOf() {
...

indexOf(a)

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

indexOf(d, e)

Array.prototype.indexOf || (Array.prototype.indexOf = function(d, e) {
    var a;
    if (null == this) throw new TypeError('"this" is null or not defined');
    var c = Object(this),
        b = c.length >>> 0;
    if (0 === b) return -1;
    a = +e || 0;
    Infinity === Math.abs(a) && (a = 0);
    if (a >= b) return -1;
...

indexOf(e)

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

indexOf(elem)

Array.prototype.indexOf = Array.prototype.indexOf || function(elem) {
  for(var i in this){
    if(this[i] === elem) return true;  
  return false;
};

indexOf(elem)

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

indexOf(elem, from)

Array.prototype.indexOf = function(elem, from) {
  if (from == null) {
    from = 0;
  } else if (from < 0) {
    from = Math.max(0, this.length + from);
  for (var i = from, len = this.length; i < len; i++) {
    if (this[i] === elem) {
      return i;
...

indexOf(element)

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

Nodejs Array Index indexOf(el/, from/)

Method Source Code

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