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Re^2: how to measure strictness of a regex ?

by AnomalousMonk (Canon)
on Jan 23, 2013 at 01:22 UTC ( #1014821=note: print w/ replies, xml ) Need Help??

in reply to Re: how to measure strictness of a regex ?
in thread how to measure strictness of a regex ?

I, also, have some (admittedly, rather idle) curiosity: what is the purpose of the prototype in the  re_strictness() function definition?

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Re^3: how to measure strictness of a regex ?
by tobyink (Abbot) on Jan 23, 2013 at 07:47 UTC

    I think my original code when I was testing was something along the lines of:

    print re_strictness qr/.../, "\n";

    In which case the ($) prototype helps Perl see the "\n" as a parameter for print, not for re_strictness.

    By the way, it's worth pointing out that qr/^Dad+y$/ is also considered slightly stricter than qr/Dad+y/.

    use 5.014; use strict; use warnings; use re (); use List::Util 'sum'; sub re_strictness ($) { sum map length, re::regmust shift } print re_strictness qr/^Dad+y$/, "\n", re_strictness qr/Dad+y/, "\n", re_strictness qr/D.+/, "\n", ;
    package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

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