Nodejs Number Type Check isNumber()

Method Source Code

// Type validations
Object.prototype.isNumber = function (){
   return typeof this.valueOf() === 'number' ;
};

Related

1. isNumber()

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

2. isNumber(input)

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

3. isNumber(n)

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

4. isNumber(n)

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

5. isNumber(value)

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