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Regarding
this is a nice idea, but doesn't do anything special. a curly bracket is only a special character when it is found in one of these forms {n}, {n,} or {n,m}. As your example isn't like this, the bracket is just matched as a plain character. What your first regex shows is just an alternation, equivalent to the following... Note that I've escaped the curly bracket just to be explict, it's not actually necessary
--- my name's not Keith, and I'm not reasonable. In reply to Re: what means this regex? $x = qr/[0-9a-f]{4|8}/
by reasonablekeith
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