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NOTE: use Perl; is on undef hiatus. You can read content, but you can't post it. More info will be forthcoming forthcomingly.

All the Perl that's Practical to Extract and Report

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  • use List::Util qw(reduce);
    sub factorial {
        my $v = shift;
        return reduce { $a * $b } 1 .. $v;
    }

    Too bad it produces spurious warnings:

    Name "main::a" used only once: possible typo at test.pl line 5.
    Name "main::b" used only once: possible typo at test.pl line 5.