From: ara.t.howard@...
Date: 2006-11-18T03:15:19+09:00
Subject: Re: ruby equivalent PHP function is_numeric?

On Sat, 18 Nov 2006, Jason Dusek wrote:

> On 11/17/06, Josselin <josselin@wanadoo.fr> wrote:
>> After reading completely my Ruby book, I cannot find a function
>> equivalent to the PHP  is_numeric? to test a String
>
> There is no such function, although you can pretty readily use regexes
> to do it...
>
> It really is too bad that String.to_f does not throw an exception - or
> at least return NaN - when the string is not a number.

use

   Float(a_string)

it does throw.

-a
-- 
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