Re^2: regex matching specific strings.

$var =~ /^(?:abc)|(?:def)|(?:ghi)$/; is wrong. It matches strings that

You want

$var =~ /^(?:abc|def|ghi)\z/;
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Re^3: regex matching specific strings. by markkawika (Monk) on Jul 22, 2009 at 23:50 UTC
My only tiny quibble with that regex, correct as it is, is that using `^` in combination with `\z` might be confusing to a future reader. I'd suggest: `$var =~ /\A(?:abc\|def\|ghi)\z/;` [download] 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`.	[reply] [d/l] [select]
Re^4: regex matching specific strings. by Anonymous Monk on Jul 23, 2009 at 00:42 UTC
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 :)	[reply]