From merlyn at stonehenge.com  Sun Jul  1 19:27:10 2018
From: merlyn at stonehenge.com (Randal L. Schwartz)
Date: Sun, 01 Jul 2018 19:27:10 -0700
Subject: [Chicago-talk] Could someone explain this
In-Reply-To: <CAOfjraeBEuHw0JRpCW87Bp=WFRfLLVaTi0xs1jc-uqBziBwe5A@mail.gmail.com>
 (Joel Limardo's message of "Thu, 28 Jun 2018 12:56:09 -0500")
References: <20180628174735.4B69411F9F2@xx1.develooper.com>
 <CAOfjraeBEuHw0JRpCW87Bp=WFRfLLVaTi0xs1jc-uqBziBwe5A@mail.gmail.com>
Message-ID: <864lhi74ox.fsf@red.stonehenge.com>

>>>>> "Joel" == Joel Limardo <joel.limardo at forwardphase.com> writes:

Joel> The match with the /g operator says find all so and that is in
Joel> parentheses so my guess is that produces a list containing all of
Joel> the matches. That gets assigned to an anonymous array which in
Joel> turn is being assigned to a scalar which, as you should know from
Joel> rudimentary Perl lessons, results in the number of elements in the
Joel> array to be returned.

Not quite right.  There's no assignment to an anonymous array.  It's
just that "list assignment in scalar context" provides a list context to
the right side, and then counts the items it *would* have put into
something on the left side, and returns that as a scalar.

It's similar to how:

  if (my ($x, $y) = m{(.*)/(.*)}) { ... }

evaluates that list assignment in a scalar (boolean) context, which
returns 0 if it doesn't match, or 2 if it does.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn at stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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