Perl::Critic::Policy::BuiltinFunctions::RequireSimpleSortBlock - Sort blocks should have a single statement.
This Policy is part of the core Perl::Critic distribution.
Conway advises that sort functions should be simple. Any complicated operations on list elements should be computed and cached (perhaps via a Schwartzian Transform) before the sort, rather than computed inside the sort block, because the sort block is called N log N times instead of just N times.
N log N
This policy prohibits the most blatant case of complicated sort blocks: multiple statements. Future policies may wish to examine the sort block in more detail -- looking for subroutine calls or large numbers of operations.
This Policy is not configurable except for the standard options.
Chris Dolan <email@example.com>
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.
To install Perl::Critic, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.