> any ideas?

not really, cause it does what you told it to do...

  DB<101> @a = 'a'..'d'
 => ("a", "b", "c", "d")

  DB<102> 'c' =~ /[^@a]/

  DB<103> 'c' =~ /[@a]/
 => 1

  DB<104> $re=qr/[^@a]/
 => qr/[^a b c d]/

[download]

... but wrongly, please note that whitespace is now excluded too!

Apparently you're not showing the whole code.

Are you sure about the content of @aminos?

And why do you exclude 23 letters of the alphabet (in random order) instead of matching the remaining 3?

edit

your array @aminos is empty, thats why /[^]/ tries to exclude ']' within an unterminated character class.

Cheers Rolf

( addicted to the Perl Programming Language)

In reply to Re: Unmatched [ in regex; marked by <-- HERE in m/[ <-- HERE ^]/ (solved) by LanX
in thread Unmatched [ in regex; marked by <-- HERE in m/[ <-- HERE ^]/ by madM

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