What about the good old perlfaq4?

perldoc -q determine presents (regex) ways to determine if a scalar contains a number...

I checked Scalar::Util::looks_like_number and it refers to perlfaq4... ;o)

In reply to Re: Exploiting Perls idea of what is a number by linuxer
in thread Exploiting Perls idea of what is a number by rovf

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