using java script to check if string is numbers only

Question

using javascript to check if string is numbers only this is what i have but its not running any suggestions would the appreciated thanks much in advance. also if it is a string of numbers only then all numbers after the first two digits should be masked.

 var start = function RenderRC(CodeOwner) {

     var pattern = /^\d+$/;
     var Rcode = CodeOwner.toString();

     if (Rcode.valueOf.match(pattern)) {
        if (Rcode.length > 2) {
            var newcode = Rcode.substr(0, 2) + Array(Rcode.length - 2 + 1).join("*");
            return newcode;
        }
     } else {
        return Rcode;
     }
 };

`Rcode.valueOf` is a function and doesn't have `match` method — kirilloid, Apr 04 '12 at 18:58
Duplicate of http://stackoverflow.com/questions/18082/validate-numbers-in-javascript-isnumeric — Avitus, Apr 04 '12 at 18:58

score 0 · Answer 1 · edited May 23 '17 at 12:20

0

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

See here: Validate decimal numbers in JavaScript - IsNumeric()

edited May 23 '17 at 12:20

Community

1
1

answered Apr 04 '12 at 19:00

RyanS

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score 0 · Answer 2 · answered Apr 04 '12 at 19:02

0

function IsNumeric(sText) {
    var Reg = new RegExp('^\\d+$');
    var Result = sText.match(Reg);
    if (Result)
        return true;
    else
        return false;
}

answered Apr 04 '12 at 19:02

Pankaj

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score 0 · Answer 3 · answered Apr 04 '12 at 19:08

0

Remove valueOf. and it should run fine

if (Rcode.match(pattern))
...

Or add the parenthesis to it to actually call the function:

if (Rcode.valueOf().match(pattern))
...

But I don't think that function call is needed.

answered Apr 04 '12 at 19:08

Nick Rolando

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using java script to check if string is numbers only

3 Answers3