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.

In reply to Re^3: regex matching specific strings. by markkawika
in thread regex matching specific strings. by nafion112

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