Nodejs Number Value Check isNumeric()

Method Source Code

// extend the string prototype object to abstract generic functionality
String.prototype.isNumeric = function(){
    return !isNaN(parseFloat(this)) && isFinite(this);
}

Related

1. isNumber()

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

2. isNumber()

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

3. isNumber()

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

4. isNumber()

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

5. isNumber()

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

6. isNumeric()

   String.prototype.isNumeric = function() {
     return !isNaN(parseFloat(this)) && isFinite(this);
   };
   

7. isNumeric()

   String.prototype.isNumeric = function() {
     return !isNaN(parseFloat(this)) && isFinite(this);
   };
   

8. isNumeric()

   String.prototype.isNumeric = function() {
       var tmpFloat = parseFloat(this);
       if (isNaN(tmpFloat))
           return false;
       var tmpLen = this.length - tmpFloat.toString().length;
       return tmpFloat + "0".Repeat(tmpLen) == this;
   

9. isNumeric()

   var postfixStack = new Array
   String.prototype.isNumeric = function() {
       return !isNaN(parseFloat(this)) && isFinite(this);
   function MathSolver() {
   this.infixToPostfix = function(infix) {
    for(var i = 0; i < infix.length; i++) {
               var token = infix[i];
               if(token.isNumeric()) {
   ...