Nodejs Array Each each(fn)

Method Source Code

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;
    }/*from w  w  w  .  j  a  v  a2 s  .  co  m*/
}

Related

1. each(f)

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

2. each(f)

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

3. each(f)

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

4. 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) {
   ...
   

5. each(f,r)

   Array.prototype.each = function(f,r){
     if(r===-1){
       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);
   };
   

6. each(fn)

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

7. each(fn)

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

8. 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;
   };
   

9. each(fn)

   Array.prototype.each = function(fn){
       fn = fn || Function.K;
        var a = [];
        var args = Array.prototype.slice.call(arguments, 1);
        for(var i = 0; i < this.length; i++){
            var res = fn.apply(this,[this[i],i].concat(args));
            if(res != null) a.push(res);
        return a;
   ...