<pedantic type=unicode>

Not so fast! Believe it or not, \d matches 178 characters in utf8. [1]

So, while your second two solutions are equivalent, the first one is only correct if you know you're dealing with ASCII.

[1]: Just in case you don't believe me :-) 

[~] $ perl -anle'next if/[^\s\da-f]/i;$t+=hex($F[1])-hex($F[0]);
                 END{print$t}' bleadperl/lib/unicode/Is/Digit.pl 
178

[download]

</pedantic>

-dlc

In reply to (dchetlin: beware the unicode beast) Re(2): Number? by dchetlin
in thread Number? by Anonymous Monk

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