Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock(3pm)
                                           User Contributed Perl Documentation


NAME
       Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock -
       Forbid $b before $a in sort blocks.

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

DESCRIPTION
       Conway says that it is much clearer to use "reverse" than to flip $a
       and $b around in a "sort" block.  He also suggests that, in newer
       perls, "reverse" is specifically looked for and optimized, and in the
       case of a simple reversed string "sort", using "reverse" with a "sort"
       with no block is faster even in old perls.

           my @foo = sort { $b cmp $a } @bar;         #not ok
           my @foo = reverse sort @bar;               #ok

           my @foo = sort { $b <=> $a } @bar;         #not ok
           my @foo = reverse sort { $a <=> $b } @bar; #ok

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

AUTHOR
       Chris Dolan <cdolan@cpan.org>

COPYRIGHT
       Copyright (c) 2006-2011 Chris Dolan.

       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.38.0                      2023-07-26
         Perl::Critic::Policy::BuiltinFunctions::ProhibitReverseSortBlock(3pm)