Foreach not looping through all items

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perl::critic::policy::variables::requirelexicalloopiterators

Perl::Critic::Policy::Variables::RequireLexicalLoopIteraUser(Contributed Perl DocPerl::Critic::Policy::Variables::RequireLexicalLoopIterators(3pm)

NAME

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

AFFILIATION

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

DESCRIPTION

       This policy asks you to use "my"-style lexical loop iterator variables:

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

       Unless you use "my", "for"/"foreach" loops use a global variable with its value "local" to the block. In other words,

	   foreach $zed (...) {
	       ...
	   }

       is more-or-less equivalent to

	   {
	       local $zed
	       foreach $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 not changed by the
       loop. You may have unlocked your bicycle, but you can't remember which one it was.

       Lexical loop variables were introduced in Perl 5.004. This policy does not report violations on code which explicitly specifies an earlier
       version of Perl (e.g. "require 5.002;").

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       "Foreach Loops" in perlsyn

       "my() in Control Structures" in perl5004delta

AUTHOR

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

COPYRIGHT

       Copyright (c) 2005-2011 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 v5.14.2							    2012-06-07	 Perl::Critic::Policy::Variables::RequireLexicalLoopIterators(3pm)

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