Re^3: regex matching specific strings.

[markkawika]

My only tiny quibble with that regex, correct as it is, is that using ^ in combination with \z might be confusing to a future reader. I'd suggest:

$var =~ /\A(?:abc|def|ghi)\z/;

Which is technically exactly the same as ikegami's suggestion, but points out to the reader "Hey I'm using less-common techniques in this regex" right at the beginning with that \A.

[Anonymous Monk]

That is funny, because every single character in a regex could be critical, so unless you know exact meaning of every single character, you should be very very careful :)