Perl::Critic::PoPleircly::::CVUrasiretiriacbC:lo:enPsto:rl:iiRbceuyqt:ue:idVraePrLeieraxlbilcDeaoslc:Lu:omRoeepnqItutaietrrieaoLtneoxrisc(a3l)LoopIterators(3)



NNAAMMEE
       Perl::Critic::Policy::Variables::RequireLexicalLoopIterators - Write
       "for my $element (@list) {...}" instead of "for $element (@list)
       {...}".

AAFFFFIILLIIAATTIIOONN
       This Policy is part of the core Perl::Critic distribution.

DDEESSCCRRIIPPTTIIOONN
       "for"/"foreach" loops _a_l_w_a_y_s create new lexical variables for named
       iterators.  In other words

           for $zed (...) {
               ...
           }

       is equivalent to

           for my $zed (...) {
               ...
           }

       This may not seem like a big deal until you see code like

           my $bicycle;
           for $bicycle (@things_attached_to_the_bike_rack) {
               if (
                       $bicycle->is_red()
                   and $bicycle->has_baseball_card_in_spokes()
                   and $bicycle->has_bent_kickstand()
               ) {
                   $bicycle->remove_lock();

                   last;
               }
           }

           if ( $bicycle and $bicycle->is_unlocked() ) {
               ride_home($bicycle);
           }

       which is not going to allow you to arrive in time for dinner with your
       family because the $bicycle outside the loop is different from the
       $bicycle inside the loop.  You may have freed your bicycle, but you
       can't remember which one it was.

CCOONNFFIIGGUURRAATTIIOONN
       This Policy is not configurable except for the standard options.

AAUUTTHHOORR
       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

CCOOPPYYRRIIGGHHTT
       Copyright (c) 2005-2010 Imaginative Software Systems.  All rights
       reserved.

       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.  The full text of this license can
       be found in the LICENSE file included with this module.



perl v5.12.2   Perl::Critic::Polic2y0:1:1V-a0r8i-a1b4les::RequireLexicalLoopIterators(3)
