I don't see the point of using a regexp to solve this type of problem.
Ordinarily I'd agree with you, but the OP clearly stated:
I'm using the RE to untaint a number from a CGI form.

Do not rebuke them with harsh words ... but rather lead them gently - with URLs - so that they may learn wisdom.

In reply to Re^2: Match number >= 0 and <1 by VSarkiss
in thread Match number >= 0 and <1 by lupey

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