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Full Discussion: Variable Scope in Perl
Top Forums Programming Variable Scope in Perl Post 302957900 by Aia on Friday 16th of October 2015 11:06:42 AM
Old 10-16-2015
Since Perl 5.10 is being used, the given statement can do the work of a switch.

Code:
given($option) {
   when(1) { %pg = (...)}
   when(2) { %pg = (...)}
   when(3) { %pg = (...)}
   default { say "Unexpected value given"; }
}

This User Gave Thanks to Aia For This Post:
bakunin
 

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LEARN ABOUT DEBIAN

cgi::compile

CGI::Compile(3pm)					User Contributed Perl Documentation					 CGI::Compile(3pm)

NAME

       CGI::Compile - Compile .cgi scripts to a code reference like ModPerl::Registry

SYNOPSIS

	 use CGI::Compile;
	 my $sub = CGI::Compile->compile("/path/to/script.cgi");

DESCRIPTION

       CGI::Compile is an utility to compile CGI scripts into a code reference that can run many times on its own namespace, as long as the script
       is ready to run on a persistent environment.

       NOTE: for best results, load CGI::Compile before any modules used by your CGIs.

RUN ON PSGI

       Combined with CGI::Emulate::PSGI, your CGI script can be turned into a persistent PSGI application like:

	 use CGI::Emulate::PSGI;
	 use CGI::Compile;

	 my $cgi_script = "/path/to/foo.cgi";
	 my $sub = CGI::Compile->compile($cgi_script);
	 my $app = CGI::Emulate::PSGI->handler($sub);

	 # $app is a PSGI application

CAVEATS

       If your CGI script has a subroutine that references the lexical scope variable outside the subroutine, you'll see warnings such as:

	 Variable "$q" is not available at ...
	 Variable "$counter" will not stay shared at ...

       This is due to the way this module compiles the whole script into a big "sub". To solve this, you have to update your code to pass around
       the lexical variables, or replace "my" with "our". See also <http://perl.apache.org/docs/1.0/guide/porting.html#The_First_Mystery> for more
       details.

AUTHOR

       Tatsuhiko Miyagawa <miyagawa@bulknews.net>

CONTRIBUTORS

       Rafael Kitover <rkitover@cpan.org>

       Hans Dieter Pearcey <hdp@cpan.org>

COPYRIGHT &; LICENSE
       Copyright (c) 2009 Tatsuhiko Miyagawa <miyagawa@bulknews.net>

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

       ModPerl::RegistryCooker CGI::Emulate::PSGI

perl v5.14.2							    2011-05-24							 CGI::Compile(3pm)
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