There is also Regexp::Common. Ex:

if ( $RE{num}{int}->matches($text) ) {...}
if ( $RE{num}{real}->matches($text) ) {...}

This library is cool because you can refine/define exactly what you mean by number.

In reply to Re: A function to determine if a string is numeric by trwww
in thread A function to determine if a string is numeric by juliosergio

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