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Determine If A Syntactically Correct Series Of Characters Is Numeric (the Golf Version) In Ruby

08.07.2010
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        Ruby Forum
http://www.ruby-forum.com/topic/88507#169102
 
Re: ruby equivalent PHP function is_numeric?
Posted by Wilson Bilkovich (Guest) on 18.11.2006 06:22  
On 11/17/06, David Vallner <david@vallner.net> wrote:
> >> regex... ?)
>
> def is_numeric?(n) begin Float n; return true rescue false end
>
> Predicate methods not returning a boolean make my skin crawl even if
> it's all the same difference for conditionals.
>

Or the golf version:
def is_numeric?(n)
  !!Float(n) rescue false
end

[or
def is_numeric?(n) !!Float(n) rescue false end
or
def is_numeric?(n) {!!Float(n) rescue false}
?]