Query: perl::critic::policy::inputoutput::prohibitjoinedreadline
OS: debian
Section: 3pm
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
Perl::Critic::Policy::InputOutput::ProhibitJoinedReadlinUsermContributed Perl DocumePerl::Critic::Policy::InputOutput::ProhibitJoinedReadline(3pm)NAMEPerl::Critic::Policy::InputOutput::ProhibitJoinedReadline - Use "local $/ = undef" or File::Slurp instead of joined readline.AFFILIATIONThis Policy is part of the core Perl::Critic distribution.DESCRIPTIONIt's really easy to slurp a whole filehandle in at once with "join q{}, <$fh">, but that's inefficient -- Perl goes to the trouble of splitting the file into lines only to have that work thrown away. To save performance, either slurp the filehandle without splitting like so: do { local $/ = undef; <$fh> } or use File::Slurp, which is even faster. Note that if the "ProhibitPunctuationVars" policy is also in effect, it will complain about the use of $/ in the line above. In that case, write this instead: use English '-no_match_vars'; do { local $INPUT_RECORD_SEPARATOR = undef; <$fh> };CONFIGURATIONThis Policy is not configurable except for the standard options.CAVEATSDue to a bug in the current version of PPI (v1.119_03) and earlier, the readline operator is often misinterpreted as less-than and greater- than operators after a comma. Therefore, this policy only works well on the empty filehandle, "<>". When PPI is fixed, this should just start working.CREDITSInitial development of this policy was supported by a grant from the Perl Foundation.AUTHORChris Dolan <cdolan@cpan.org>COPYRIGHTCopyright (c) 2007-2011 Chris Dolan. Many 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 v5.14.2 2012-06-07 Perl::Critic::Policy::InputOutput::ProhibitJoinedReadline(3pm)
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