Nodejs Number Value Check even()

Method Source Code

Number.prototype.even = function(){
    return (this % 2 === 0);
};

Related

1. odd()

   Number.prototype.odd = function () {
     return (this % 2 == 1)
   

2. odd()

   Number.prototype.odd = function(){
     return ( ( this % 2 ) == 1 )
   

3. isBetween(l,h)

   Number.prototype.isBetween = function(l,h){
     return (this >= l.val() && this <= h.val());
   

4. isBetween(min, max, inclusive)

   Number.prototype.isBetween = function (min, max, inclusive) {
     return inclusive
       ? this >= min && this <= max
       : this > min && this < max;
   };
   

5. isBetweenisBetween(a, b)

   Number.prototype.isBetween = function isBetween(a, b) {
     if(a <= this) {
       return this <= b;
     return this >= b;
   

6. even()

   var puts = require("sys").puts;
   Number.square = function(n) {
     return n * n
   Number.even = function(n) {
     return n % 2 == 0
   Number.odd = function(n) {
     return !this.even(n)
   ...
   

7. isNumber()

   String.prototype.isNumber = function(){
     return !isNaN(this);
   };
   

8. isNumber()

   String.prototype.isNumber = function(){
     var pattern=/^[+\-]?\d+(.\d+)?$/;
     flag=pattern.test(this);
     if(flag) return true;
     return false;
   

9. isNumber()

   String.prototype.isNumber = function (){
       var str = this;
       return !isNaN(str);