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24 Mar 2021 03:09:35 UTC
- Distribution: Perl-Critic
- Module version: 1.140
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Bus factor: 2- 90.11% Coverage
- License: perl_5
- Perl: v5.6.1
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Jeffrey Thalhammer
- Dependencies
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- File::Path
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- PPI
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NAME
Perl::Critic::Policy::BuiltinFunctions::ProhibitVoidMap - Don't use
map
in void contexts.AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
map
andgrep
are intended to be pure functions, not mutators. If you want to iterate with side-effects, then you should use a properfor
orforeach
loop.grep{ print frobulate($_) } @list; #not ok print map{ frobulate($_) } @list; #ok grep{ $_ = lc $_ } @list; #not ok for( @list ){ $_ = lc $_ }; #ok map{ push @frobbed, frobulate($_) } @list; #not ok @frobbed = map { frobulate($_) } @list; #ok
CONFIGURATION
This Policy is not configurable except for the standard options.
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.
Module Install Instructions
To install Perl::Critic, copy and paste the appropriate command in to your terminal.
cpanm Perl::Critic
perl -MCPAN -e shell install Perl::Critic
For more information on module installation, please visit the detailed CPAN module installation guide.