You just need to do apt-get install --only-upgrade <packagename>. This will upgrade only that single package, and only if it is installed.

If you wish to install the package if it doesn't exist, or upgrade it if it does, you may leave out --only-upgrade.

Wheezy est le nom de code de développement de Debian 7.0. Wheezy a bénéficié d'une prise en charge à long terme (LTS) jusqu'au 31-05-2018. Cette version est maintenant archivée et ne reçoit plus de mise à jour officielle de sécurité. Cette version a été remplacée par la version Jessie le 25-04-2015.

Perl 5 with modern defaults

I saw developers taking other people's solutions for granted. Not thinking twice about the approach, not bothering about analyzing it. Ok, when this is Dan Abramov telling you how to use React or documentation saying that this is the only way to use its API, then yes, you probably should agree with it. Yet, when you're using some tech content without at least a bit of skepticism, then well, you still might go far in your career, but it also may hold you back.

Compiled by Peteris Krumins (peter@catonmat.net, @pkrumins on Twitter)
http://www.catonmat.net -- good coders code, great reuse

Latest version of this file is always at:

http://www.catonmat.net/download/perl1line.txt

This file is also available in other languages:

Chinese: https://github.com/vinian/perl1line.txt

Please email me peter@catonmat.net if you wish to translate it.

Perl One-Liners on Github:

https://github.com/pkrumins/perl1line.txt

You can send me pull requests over GitHub! I accept bug fixes,
new one-liners, translations and everything else related.

I have also written "Perl One-Liners Explained" ebook that's based on
this file. It explains all the one-liners here. Get it at:

http://www.catonmat.net/blog/perl-book/

No Starch Press has published "Perl One-Liners" as a real book too:

http://nostarch.com/perloneliners

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Slides of Tim Bunce's talk on Devel::NYTProf and optimizing perl code at YAPC::NA in June 2014. It covers use of NYTProf and outlines a multi-phase approach to optimizing your perl code.

A video of the talk and questions is available.