| Perl::Critic::Policy::BuiltinFunctions::ProhibitVoidGrep(3pm) | User Contributed Perl Documentation | Perl::Critic::Policy::BuiltinFunctions::ProhibitVoidGrep(3pm) |
Perl::Critic::Policy::BuiltinFunctions::ProhibitVoidGrep - Don't use "grep" in void contexts.
This Policy is part of the core Perl::Critic distribution.
"map" and "grep" are intended to be pure functions, not mutators. If you want to iterate with side-effects, then you should use a proper "for" or "foreach" 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
This Policy is not configurable except for the standard options.
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
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.
| 2023-01-15 | perl v5.36.0 |