Comments on snippet: 'Convert String to Number in Javascript'

darkphotn said on 1/13/08

Sun, 13 Jan 2008 16:01:45 GMT

Original code modified -- the new method is based on inamorix's, and is better than the original (and also better than tps's).

tpsreport, that link is dead. Check the page.

Sun, 13 Jan 2008 15:51:06 GMT

This is a quick and dirty one-line hack that works.

A more professional method would be:

function $n (n) { return (typeof(n) == 'number') ? new Number(n) : NaN; } // originally posted by inamorix

Sun, 13 Jan 2008 14:52:36 GMT

Do not use this code! This is amateur-level fail. Javascript has plenty of type-casting functions available that do this properly.

Given an input value of x, you can do the following:

parseInt(x, 10) // returns x as an integer in base 10 parseInt(x, 16) // returns x as an integer in hex parseFloat(x) // returns x as a float

See the Mozilla reference docs here: http://developer.mozilla.org/en/docs/CoreJavaScript1.5Guide:PredefinedFunctions:parseIntandparseFloat_Functions