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Mathematics and computer science

locatepm

By Daniel Șuteu February 20, 2012

Find installed Perl modules matching a regular expression. It's very fast and efficient.

Download: https://github.com/trizen/perl-scripts/blob/master/Finders/locatepm

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Daniel Șuteu

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YouTube Viewer

By Daniel Șuteu March 02, 2012

# GTK YouTube Viewer This application came to life in 12 September 2010 as my first GTK2/Glade learning project.

Its scope is to search and play YouTube videos in a native player. It comes with various search options; it can search for videos, playlists and/or channels. The videos are streamed directly in a selected video player at the best resolution (customizable) and with closed-captions (if available).

By default, the application supports three video players: MPV (recommended), MPlayer and VLC, but it allows the addition of more players inside the configuration file.

For a better experience, the application also comes with built-in authentication support, using the OAuth 2.0 mechanism. After inserting the authentication token, a new tab will appear, named "My panel", which has the following buttons:
SubscriptionsFavorited videosLiked videosDisliked videosUploadsPlaylistsLog outFor more details (+screenshots), see also:
http://www.webupd8.org/2015/02/youtube-viewer-complete-…

obmenu-generator

By Daniel Șuteu February 21, 2012

obmenu-generator is a simple, lightweight, easily configurable Perl script that generates a full Openbox XML-menu based upon the information present in *.desktop application files (related to fbmenugen and menutray).

It has full support for icons (respecting the current icon theme) and can generate either a static or a dynamic menu.

The parsing of the *.desktop files is provided by the Linux::DesktopFiles module.

In a dynamic menu, the entries are updated automatically when a new application is installed or when the current icon theme is changed by the user.

Starting with version 0.61, obmenu-generator introduced a new smart-cache system which will store all the required data from the *.destkop files in a new cache.db file, which is also updated automatically when a new application is (re)installed or when the config.pl or schema.pl are changed. With the new cache-system in place, a full menu with icons is generated in ~8ms (compared to ~60ms before).

In version 0.80, we introduced ye…

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alsi is a system information tool, designed for Arch Linux, related to archey and screenfetch, but more configurable.

All the configuration files are in: ~/.config/alsi

For example, to configure it for Gentoo, get the gentoo logo and put it in alsi.logo file, change something in alsi.output and alsi.conf files (if necessary) and then execute: alsi -f -l -c1=blue -c2=purple

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1. Changing alsi.output:

my$b="\b\b\b\b";[{HARDCODED=>"\b\e[1;37m\e[41mTHIS IS ALSI\e[0m"},{OS=>$b.'%13sOS:%s %s'},# Operating system{HOSTNAME=>$b.'%4sHostname:%s %s'},# Hostname{UPTIME=>$b.'%9sUptime:%s %s'},# Uptime{KERNEL=>$b.'%9sKernel:%s %s'},# Kernel version{SHELL=>$b.'%10sShell:%s %s'},# Shell{PACKAGES=>$b.'%sPackages:%s %s'},# Number of installed packages{WM_DE=>$b."%13s%s:%s %s"},# WM or DE{GTK2_THEME=>$b.'%10sTheme:%s %s'},# Gtk2 theme{GTK2_ICON_THEME=>

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By Daniel Șuteu February 21, 2012

Menutray is a simple menu generator (related to obmenu-generator and fbmenugen).

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Starting with version 0.42, menutray supports Gtk3 with the --gtk3 option.

Github: https://github.com/trizen/menutray
AUR Link: https://aur.archlinux.org/packages/menutray/

obbrowser

By Daniel Șuteu December 29, 2012

obbrowser is a very simple script which displays files and directories in the Openbox menu. It recursively browse the filesystem through openbox3 pipe menus. (related to fbrowse-tray)

The following line needs to be added inside the menu.xml file:
<menu id="obbrowser /my/dir" label="Disk" execute="obbrowser"/>

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The script supports a large variety of icons, thanks to File::MimeInfo module.

Github: https://github.com/trizen/obbrowser
AUR link: https://aur.archlinux.org/packages/obbrowser/

Simple version, in C++:
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Simpler version, in Go:
https://github.com/trizen/go-learning/blob/master/openbox-pipefs.go

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In this post I would like to present some interesting exercises in number theory, along with some curious formulas and identities for some number-theoretic functions.

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The Fibonacci sequence is, without doubt, one of the most popular sequences in mathematics and in popular culture, named after Italian mathematician Leonardo of Pisa (also known as Fibonacci, Leonardo Bonacci, Leonardo of Pisa, Leonardo Pisano Bigollo, or Leonardo Fibonacci), who first introduced the numbers in Western European with his book Liber Abaci, in 1202.

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By Daniel Șuteu February 21, 2012

fbmenugen is a simple menu generator for the Fluxbox WM (related to menutray and obmenu-generator).

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