I would personnally use the !~ operator

% perl -le'print "Good" if "NZ312000" !~ /^N.*?00$/'
% perl -le'print "Good" if "NZ312005" !~ /^N.*?00$/'
Good
% perl -le'print "Good" if "NZ312050" !~ /^N.*?00$/'
Good

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Update: all of the above is indeed flawed, and more elegant solutions than splitting the regex in two (/^N/ and /00$/) have already been pointed out.

In reply to Re: ^N.*(?!00$) by Fang
in thread ^N.*(?!00$) by ady

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