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CentOS 7.0 - man page for english (centos section 3pm)

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

NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English qw( -no_match_vars ) ; # Avoids regex performance penalty use English; ... 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
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 v5.16.3 2013-03-04 English(3pm)


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