I simply didn't think about doing it that way. I could probably count the number of times I've used map in a scalar context on my fingers.

That said, given that the original question was about gene sequences, which can be pretty long strings, it seems preferable to avoid the creation of a temporary array containing all matches. Whether that's an important concern or not depends on many factors (typical number of matches expected; typical length of matched strings; etc).

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re^3: Using grep in a scalar context by tobyink
in thread Using grep in a scalar context by newbie1991

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