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.IX Title "Perl::Critic::Policy::BuiltinFunctions::RequireSimpleSortBlock 3pm"
.TH Perl::Critic::Policy::BuiltinFunctions::RequireSimpleSortBlock 3pm "2018-07-27" "perl v5.26.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Perl::Critic::Policy::BuiltinFunctions::RequireSimpleSortBlock \- Sort blocks should have a single statement.
.SH "AFFILIATION"
.IX Header "AFFILIATION"
This Policy is part of the core Perl::Critic
distribution.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
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 \f(CW\*(C`N log N\*(C'\fR times
instead of just \f(CW\*(C`N\*(C'\fR times.
.PP
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.
.SH "CONFIGURATION"
.IX Header "CONFIGURATION"
This Policy is not configurable except for the standard options.
.SH "AUTHOR"
.IX Header "AUTHOR"
Chris Dolan <cdolan@cpan.org>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2006\-2011 Chris Dolan.
.PP
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.