Nodejs Array Each each(f,r)

Method Source Code

Array.prototype.each = function(f,r){//(function,reverse) reverse=-1 retu rn
   if(r===-1){//from   w  ww  .j  av  a2 s.com
      for(var i=this.length-1;i>=0;i--)f(this[i],i);
   }else{
      for(var i=0,l=this.length;i<l;i++)f(this[i],i);
   }
};

Related

1. each(f)

   Array.create = function(f, count) {
       var arr = [];
       for (var i = 0; i < count; ++i) {
           arr.push(f(i));
       return arr;
   Array.prototype.each = function(f) {
       for (var i = 0; i < this.length; i += 1) {
   ...
   

2. each(f)

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

3. each(f)

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

4. each(f)

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

5. each(f, callback)

   var crypto = require('crypto')
   var http = require('http');
   Array.prototype.each = function(f, callback) {
       for (var i = 0, l = this.length; i < l; i++) {
           f(this[i]);
       if (callback) callback();
   Array.prototype.asyncEach = function(f, callback, i) {
   ...
   

6. each(fn)

   Array.prototype.each = function(fn) {
       if (!fn) return false;
       for(let i = 0, len = this.length; i < len; i++) {
           if (fn(this[i], i) === false) return false;
   

7. each(fn)

   Array.prototype.each = function(fn) {
     for (var i = 0; i < this.length; i++) fn(this[i]);
   

8. each(fn)

   Array.prototype.each = function(fn)
     for (var i=0; i<this.length; i++)
       fn.apply(this[i], [i]);
   };
   

9. each(fn)

   Array.prototype.each = function (fn) {
     var i = 0, length = this.length, ret;
     fn = typeof fn === 'function' ? fn : function () {};
     for (; i < length; i++) {
       ret = fn.call(this[i], i, this[i]);
       if (ret === false || ret !== undefined && ret !== true) {
         return ret;
     return this;
   };