From: Jason Lillywhite <jason.lillywhite@...>
Date: 2009-03-17T13:43:33+09:00
Subject: numeric boolean check

Is there a way to check for numeric in Ruby similar to the way you can
in Lisp?

(number? 5)      => #t
(number? -0.453) => #t
(number? 'a)     => #f

returns true for any numeric value and false for everything else.

This:
Float(x) rescue false

almost works but doesn't return true on numeric values
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