Nodejs Array ForEach forEach2(a)

Method Source Code

Array.prototype.forEach2 = function (a) {
  for (var b = 0; b < this.length; ++b) a(this[b], b, this)
};

Array.prototype.map2 = function (a) {
  var l = this.length;
  var array = new Array(l),
    i = 0;// ww w.j  a  va2s.c  o  m
  for (; i < l; i++) {
    array[i] = a(this[i], i)
  }
  return array;
}

Array.prototype.unique = function () {
  return this.filter(function (value, index, self) {
    return self.indexOf(value) === index;
  });
};

function hasClass(ele, cls) {
  return ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
}

function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += " " + cls;
}

function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
    ele.className = ele.className.replace(reg, ' ');
  }
}

Related

1. forEach(func, thisObj)

   Array.prototype.forEach = Array.prototype.forEach || (Array.prototype.forEach = function(func, thisObj) {
     for (var i=0, l=this.length; i<l; ++i) {
       func.call(thisObj, this[i], i, this);
     };
   });
   

2. forEach(iterator)

   Array.prototype.forEach = function(iterator) {
     for (var i = 0, len = this.length; i < len; i++) {
       iterator(this[i], i);
   };
   

3. forEach(predicate)

   Array.prototype.forEach = function(predicate)
     for (var i = 0; i < this.length; i++)
       predicate(this[i]);
   Array.prototype.contains = function(o)
     return this.indexOf(o) >= 0;
   

4. forEach.call(items, (item)>

   items = document.querySelectorAll('x-markdown')
   Array.prototype.forEach.call(items, (item)=>{
     html = marked(item.textContent)
     item.innerHTML = html
   })
   

5. forEach1( callback )

   Array.prototype.forEach1 = function ( callback ) {
           for (var j = 0, k ; k=this[j++]; ) {  callback(k,j,this) ; }
   Array.prototype.forEach2 = function ( callback ) {
           for (var j = 0 ; j < this.length; j++ ) {  callback(this[j],j,this) ; }
   Array.prototype.forEach3 = function ( callback ) {
           var j = 0 ; while( this[j++] ) {  callback(this[j],j,this) ; }
   var a = [1,2,3,4,5,6,7,8,9,0] ;
   function unit ( method ) 
      var s = [] ;
       a[method]( function (v,i,a) { s.push(i+":"+v); } )
     return s ;
   function loop ( size, method ) {
   var t1 = new Date() ;
    while ( size--) { unit(method); }
   return (new Date()) - t1 ;
   loopall = function ( ) {
    var s = [] ;
    var j = 0, method ; while ( method = arguments[j++] ) {
     s.push( method + ": " +  loop( 1e4 , method )  + " ms " ) ;
      return s ;
   } ( "forEach1", "forEach2", "forEach3" ) .join("\n") ;
   

6. forEachCallback(callback, finishCallback)

   'use strict';
   Array.prototype.forEachCallback = function(callback, finishCallback) {
     var current = 0;
     var self = this;
     var next = function() {
       if (!self) {
         console.log("Something went wrong...");
         throw('No self!');
         return;
   ...
   

7. forEachSync(callback,compliteCallBack)

   var async = require('async');
   var worker = function(array,callback,compliteCallBack){
     var index = 0;
     var q = async.queue(function(item,cb){
       var cback = function(){
         index = index+1;
         cb();
       };
       callback(item,index,cback)
   ...
   

8. forEachSync(callback,compliteCallBack)

   var async = require('async');
   var worker = function(array,callback,compliteCallBack){
     var index = 0;
     var q = async.queue(function(item,cb){
       var cback = function(){
         index = index+1;
         cb(); 
       };
       process.nextTick(function(){
   ...
   

9. foreach( callback )

   Array.prototype.foreach = function( callback ) {
     for( var k=0; k<this .length; k++ ) {
       callback( k, this[ k ] );
   };