Nodejs Number Iterate downto(t, cb)

Method Source Code

// Ruby = 15.downto(10) { |i| puts i }
// JS   = (15).downto(10, function(i){console.log(i);})
Number.prototype.downto = function(t, cb) {
  var i = this;/*from w w  w.j av  a 2s  .  c o m*/
  if(t > this) return +this;
  while (i >= t) { cb(i--); }
  return +this;
};

Related

1. upto(up, iterator)

   Number.prototype.upto = function (up, iterator) {
     for (var i = this.valueOf(); i <= up; i++) {
       iterator(i);
     return this.valueOf();
   };
   

2. upto(from)

   Number.prototype.upto = function (from) {
     var a = [];
     var to = this.valueOf();
     var i = to - 1;
     while (i++ < from) {
       a.push(i);
     return a;
   };
   ...
   

3. upto(t, cb)

   Number.prototype.upto = function (t, cb) {
     var i = this;
     if(t < this) {
       return +this;
     while (i <= t) {
       cb(i++);
     return +this;
   ...
   

4. upto(t, cb)

   Number.prototype.upto = function(t, cb) {
     var i = this;
     if(t < this) return +this;
     while (i <= t) { cb(i++); }
     return +this;
   };
   

5. downto(t, cb)

   Number.prototype.downto = function (t, cb) {
     var i = this;
     if(t > this) {
       return +this;
     while (i >= t) {
       cb(i--);
     return +this;
   ...
   

6. downto(to)

   Number.prototype.downto = function (to) {
     var a = [];
     var from = this.valueOf();
     var i = from + 1;
     while (i-- > to) {
       a.push(i);
     return a;
   };
   ...