Nodejs Number Value Check isNumber()

Method Source Code

/**// w  ww .ja  v  a 2  s. c  o m
 * Checks if the string a string representation of a numeric value
 * @returns {boolean}
 */
String.prototype.isNumber = function(){
   return !isNaN(this);
};

Related

1. isBetween(l,h)

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

2. isBetween(min, max, inclusive)

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

3. isBetweenisBetween(a, b)

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

4. even()

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

5. 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)
   ...
   

6. isNumber()

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

7. isNumber()

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

8. isNumber()

   String.prototype.isNumber = function()
     return (/^\d+$/.test(this.Trim()));
   

9. isNumber()

   String.prototype.isNumber = function()
     try
       var value = this.toString();
       value = value.replace(",","");
         if (parseFloat(value)!= value)
           return false;
         else
   ...