in reply to conditional regex
/y(es)?/i which matches ys or ye also,No it doesn't. The "es" is optional, so it matches "y" or "yes". Never "ye" or "ys".
-- Randal L. Schwartz, Perl hacker
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.
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In Section
Seekers of Perl Wisdom