Scalar::Util provides an excellent looks_like_number function.

use Scalar::Util qw< looks_like_number >;
use Test::More tests => 6;

ok looks_like_number '1';
ok looks_like_number '123';
ok looks_like_number '-123';
ok looks_like_number '1.0';
ok looks_like_number '123.0';
ok looks_like_number '-123.0';

[download]

View the source for Scalar::Util::PP - it's got a few regular expressions you could probably borrow.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: Floating Point/Integer Regular Expression by tobyink
in thread Floating Point/Integer Regular Expression by shortyfw06

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