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English(3pm)           Perl Programmers Reference Guide           English(3pm)




NAME

       English - use nice English (or awk) names for ugly punctuation
       variables


SYNOPSIS

           use English;
           use English qw( -no_match_vars ) ;  # Avoids regex performance
                                               # penalty in perl 5.16 and
                                               # earlier
           ...
           if ($ERRNO =~ /denied/) { ... }


DESCRIPTION

       This module provides aliases for the built-in variables whose names no
       one seems to like to read.  Variables with side-effects which get
       triggered just by accessing them (like $0) will still be affected.

       For those variables that have an awk version, both long and short
       English alternatives are provided.  For example, the $/ variable can be
       referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the
       English module.

       See perlvar for a complete list of these.


PERFORMANCE

       NOTE: This was fixed in perl 5.20.  Mentioning these three variables no
       longer makes a speed difference.  This section still applies if your
       code is to run on perl 5.18 or earlier.

       This module can provoke sizeable inefficiencies for regular
       expressions, due to unfortunate implementation details.  If performance
       matters in your application and you don't need $PREMATCH, $MATCH, or
       $POSTMATCH, try doing

          use English qw( -no_match_vars ) ;

       .  It is especially important to do this in modules to avoid penalizing
       all applications which use them.



perl v5.24.0                      2016-03-01                      English(3pm)

perl 5.24 - Generated Sun Nov 6 18:13:57 CST 2016
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