NAME

Acme::CPANLists::PERLANCAR::MagicVariableTechnique - Modules which employ magic variable technique to do stuffs

VERSION

This document describes version 0.26 of Acme::CPANLists::PERLANCAR::MagicVariableTechnique (from Perl distribution Acme-CPANLists-PERLANCAR), released on 2017-09-08.

MODULE LISTS

Modules which employ magic variable technique to do stuffs

This is a list of modules which provide some "magic" variable which you can get/set to perform stuffs. I personally find this technique is mostly useful to "temporarily set" stuffs, by combining it with Perl's local().

• File::chdir

  Provides $CWD which you can use to change directory. By doing:

   local $CWD = ...;

  in a subroutine or block, you can safely change directory temporarily without messing current directory and breaking code in other parts. Very handy and convenient.

  This is the first module I found/use where I realized the technique. Since then I've been looking for other modules using similar technique, and have even created a few myself.

• File::umask

  Provides $UMASK to get/set umask.

• Umask::Local

  Like File::umask, but instead of using a tied variable, uses an object with its DESTROY method restoring original umask. I find the interface a bit more awkward.

  Alternate modules: File::umask

• Locale::Tie

  Provides $LANG, $LC_ALL, $LC_TIME, and few others to let you (temporarily) set locale settings.

• Locale::Scope

  Like Locale::Tie, but instead of using a tied variable, uses an object with its DESTROY method restoring original settings.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Acme-CPANLists-PERLANCAR.

SOURCE

Source repository is at https://github.com/perlancar/perl-Acme-CPANLists-PERLANCAR.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Acme-CPANLists-PERLANCAR

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

SEE ALSO

Acme::CPANLists - about the Acme::CPANLists namespace

acme-cpanlists - CLI tool to let you browse/view the lists

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2017, 2016, 2015 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.