Nodejs Number Value Check isNumeric(iLoc)

Method Source Code

String.prototype.isNumeric = function (iLoc) {
    iLoc = ((!!iLoc) ? iLoc : 0);// w ww .j a va 2 s .  c o m
    iLoc = ((iLoc < 0) ? 0 : iLoc);
    iLoc = ((iLoc > (this.length - 1)) ? this.length : iLoc);
    var _ch = this.substr(iLoc, 1);
    var b = ( (_ch >= '0') && (_ch <= '9') );
    return b;
}

Related

1. isNumeric()

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

2. isNumeric()

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

3. isNumeric()

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

4. 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;
   

5. 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()) {
   ...
   

6. isNumeric(value, isString)

   Number.isNumeric = function isNumeric(value, isString) {
       if (typeof value === "string" && isString) {
           return Number.isInteger(value, true) || Number.isFloat(value, true);
       return Number.isInteger(value) || Number.isFloat(value);
   };