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Perl::Critic::PPerl::CUsercContributednPerluDocumentationtReadlineInForLoop(3) NAME Perl::Critic::Policy::InputOutput::ProhibitReadlineInForLoop - Write "while( $line = <> ){...}" instead of "for(<>){...}". AFFILIATION This Policy is part of the core Perl::Critic distribution. DESCRIPTION Using the readline operator in a "for" or "foreach" loop is very slow. The iteration list of the loop creates a list context, which causes the readline operator to read the entire input stream before iteration even starts. Instead, just use a "while" loop, which only reads one line at a time. for my $line ( <$file_handle> ){ do_something($line) } #not ok while ( my $line = <$file_handle> ){ do_something($line) } #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. perl v5.32.1 Perl::Critic::Policy::InputOutput::ProhibitReadlineInForLoop(3)
NAME | AFFILIATION | DESCRIPTION | CONFIGURATION | AUTHOR | COPYRIGHT
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