AWK Output into a variable Post: 302272249

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LEARN ABOUT CENTOS

perl::critic::policy::inputoutput::prohibitjoinedreadline

Perl::Critic::Policy::InputOutput::ProhibitJoinedReadlinUser Contributed Perl DocumentPerl::Critic::Policy::InputOutput::ProhibitJoinedReadline(3)

NAME

       Perl::Critic::Policy::InputOutput::ProhibitJoinedReadline - Use "local $/ = undef" or File::Slurp instead of joined readline.

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       It'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> };

CONFIGURATION

       This Policy is not configurable except for the standard options.

CAVEATS

       Due 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.

CREDITS

       Initial development of this policy was supported by a grant from the Perl Foundation.

AUTHOR

       Chris Dolan <cdolan@cpan.org>

COPYRIGHT

       Copyright (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 v5.16.3							    2014-06-09	      Perl::Critic::Policy::InputOutput::ProhibitJoinedReadline(3)

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