Nodejs Number Type Check isNumber()

Method Source Code

Number.prototype.isNumber = function()
{
   try//from w w w. j  a  v  a  2 s.c  om
   {
      var value = this.toString();

      value = value.replace(",","");

       if (parseFloat(value)!= value)
          return false;
       else
          return true;
   }
   catch (err)
   {
      return false;
   }
};

Related

1. isInt()

   Number.prototype.isInt = function() {
     return parseFloat(this) == parseInt(this, 10) && !isNaN(this);
   };
   

2. isInteger()

   Number.prototype.isInteger = function () {
       "use strict";
       var ans = false;
       if (this % 1 == 0) {
           ans = true;
       return ans;
   };
   

3. isInteger()

   Number.prototype.isInteger = function(){
     var ans = false;
     if(this%1==0){
       ans = true;
     return ans;
   };
   

4. isInteger()

   Number.prototype.isInteger = function(){
     var ans = false;
     if(this % 1 == 0){
       ans = true
     return ans;
   

5. isNumber()

   var assert=require('assert');
   var Number=function(number){
       this.number = number;
   Number.prototype.isNumber=function(){
       return isNaN(this.number);
   Number.prototype.isEven=function(){
       return this.number%2==0;
   ...
   

6. isNumber(input)

   function isNumber(input) {
       return typeof input === "number" ? true : false;
   

7. isNumber(n)

   function isNumber(n) {
      return typeof n == 'number';
   

8. isNumber(n)

   function isNumber(n) 
     return !isNaN(parseFloat(n)) && isFinite(n);
   

9. isNumber(value)

   function isNumber(value){
     var text = /^[0-9]*$/;
     return text.test(value);