Free tongue in software for linux

Open Source in Tab is an extension which opens the pages source file in a new tab.

Opens the pages source file in a new tab. Has a preference to either open source in a new tab or existing tab.

Exceptions in C implements fully-functional nested exceptions with these constructs:

try
except
on
throw

Also, it allows to define various datatypes for exception object (default is int, can be anything from char * to struct foo *).

Compiling and running

Precodey straight forward.

admp@sols:~/excc/example$ gcc exception.c -c
admp@sols:~/excc/example$ gcc exception.o example.c -o example
admp@sols:~/excc/example$ ./example
Usage: ./example A B
admp@sols:~/excc/example$ ./example 100 2
100/2=50
Program is going to end its short life.
admp@sols:~/excc/example$ ./example 100 0
Caught up division by zero (100/0).
Program is going to end its short life.

Attributions:

Felix Ogg for inspiring me to write finally, also detailed feedbacks and ideas for documentation (diagrams too!). Though I havent completed that - for almost a year now; I am not sure I ever will.

Skolelinux is made as free (as in speech) software, and also Skolelinux is an overall computer solution based on schools resources and needs.
- Skolelinux is a network architecture tailored for use in schools.
- Skolelinux is developed and supported by a large and growing international community.
- Skolelinux is designed to be easy and cheap to maintain.
- Skolelinux gives the students their own usernames, home directories and services.
- Skolelinux includes OpenOffice.org
Skolelinux, Debian and all auxiliary software components we use are free software ? free as in freedom. The term "free software" implies the following rights:
- Freedom to use the software regardless of purpose and adapt it to ones needs.
- Freedom to study how the software works.
- Freedom to redistribute the software so ones neighbour can benefit from it.
- Freedom to modify and enhance the software and publish those modifications so everyone benefits from them.
These rights form the foundation of both Debian, Skolelinux and all the software we use. They enable us to use the various software components, put them together in our specialized network design and package and redistribute the software as "Skolelinux".
With proprietary software, such as Microsoft Windows, all adaptions and modifications have to be redone everywhere. With Skolelinux, modifications and enhancements done by a school in Norway may benefit schools in Eritrea ? and vice versa. Windows is the most commonly used operative system used in schools today, but as Windows is proprietary software, it is not possible to tailor Windows for school usage and call it "SkoleWindows".
Skolelinux (aka debian-edu) is a Custom Debian Distribution. This means that Skolelinux is a version of the Debian GNU/Linux operating system that is customized for schools. Debian is a state-of-the-art, user-friendly operating system. The goal of our customization of Debian is to make it easy to install and maintain for schools. ? with all applications available in the students mother tongue.
Despite how easy Skolelinux is to install, asking only a handful of (non-technical) questions, it is an advanced network solution, with many pre-configured services. With ordinary, closed, proprietary software, these services have to be configured manually for every single school ? and that needs careful planning and expertise!
Amongst several pre-configured services are the following:
- Central user catalogue: One username and one password for several machines and services.
- Central storage: Regardless of which machine you use in a Skolelinux network, you have access to your files and meet an interface with your settings ? an interface you are familiar with.
- Thin client solution: The applications are run on a thin client server, which is a powerful machine. The image from those applications is drawn on a "thin client", which usually is an old and cheap machine. This enables you to use old hardware. Moreover, it eases administration, as you have one server to maintain.
- Printers may be shared and made available in the network.
- A proxy server caches files downloaded from the Internet, resulting in a faster surfing experience.
Enhancements:
- This is a community release with comprehensive support from regional and national projects in Germany, Spain, France, Greece and Norway. The Skolelinux project is now a part of Debian under the name Debian-Edu. Several other projects have made additional functionality to Skolelinux tailored for national needs. Skolelinux now supports more than 50 countries. Whats new in Skolelinux 3.0: based on Debian 4.0 "etch" and therefore compatible to LSB 3.1, using kernel 2.6.18 and KDE 3.5.5...

Set photo in Kopete is a really simple service menu that just sets the current photo as your photo in Kopete, nothing more, nothing less.

It doesnt handle directories containing space yet, if someone have a workaround so that KURL dont escapes all characters that would be nice=)

Just put this file in ~/.kde/share/apps/konqueror/servicemenus or use http://www.kde-look.org/content/show.php?content=11435 to install it.

run in xterm is an servcie menu which adds "run in xterm" & "run in xterm as root" to action menu on binary files, scripts etc.

It has 2 languages: english and polish.

Installation:

copy/save this file in
~/.kde/share/apps/konqueror/servicemenus

A Sudoku Solver in C is a console-based Linux program, written in C language, that solves Su Doku puzzles using deductive logic. It will only resort to trial-and-error and backtracking approaches upon exhausting its deductive moves.
Puzzles must be of the standard 9x9 variety using the (ASCII) characters 1 through 9 for the puzzle symbols. Puzzles should be submitted as 81 character strings which, when read left-to-right will fill a 9x9 Sudoku grid from left-to-right and top-to-bottom. In the puzzle specification, the characters 1 - 9 represent the puzzle givens or clues. Any other non-blank character represents an unsolved cell.
The puzzle solving algorithm is home grown. I did not borrow any of the usual techniques from the literature, e.g. Donald Knuths "Dancing Links." Instead I rolled my own from scratch as a personal challenge. As such, its performance can only be blamed on yours truly. Still, I feel it is quite fast. On a 333 MHz Pentium II Linux box it solves typical medium force puzzles in approximately 800 microseconds or about 1,200 puzzles per second, give or take. On an Athlon XP 3000 it solves about 6,600 puzzles per sec. (Solving time is dependent upon degree of difficulty, so YMMV.)
Description of Algorithm:
The puzzle algorithm initially assumes every unsolved cell can assume every possible value. It then uses the placement of the givens to refine the choices available to each cell. I call this the markup phase.
After markup completes, the algorithm then looks for singleton cells with values that, due to constraints imposed by the row, column, or 3x3 region, may only assume one possible value. Once these cells are assigned values, the algorithm returns to the markup phase to apply these changes to the remaining candidate solutions. The markup/singleton phases alternate until either no more changes occur, or the puzzle is solved. I call the markup/singleton elimination loop the Simple Solver because in a large percentage of cases it solves the puzzle.
If the simple solver portion of the algorithm doesnt produce a solution, then more advanced deductive rules are applied.
Ive implemented two additional rules as part of the deductive puzzle solver. The first is subset elimination wherein a row/column/region is scanned for X number of cells with X number of matching candidate solutions. If such subsets (or tuples) are found in the row, column, or region, then the candidates values from the subset may be eliminated from all other unsolved cells within the row, column, or region, respectively.
The next deductive rule examines each region looking for candidate values that exclusively align themselves along a single row or column, i.e. a vector. If such candidate values are found, then they may be eliminated from the cells outside of the region that are part of the aligned row or column.
Note that each of the advanced deductive rules calls all preceeding rules, in order, if that advanced rule has effected a change in puzzle markup.
Finally, if no solution is found after iteratively applying all deductive rules, then we begin trial-and-error using recursion for backtracking. A working copy is created from our puzzle, and using this copy the first cell with the smallest number of candidate solutions is chosen. One of the solutions values is assigned to that cell, and the solver algorithm is called using this working copy as its starting point. Eventually, either a solution, or an impasse is reached.
If we reach an impasse, the recursion unwinds and the next trial solution is attempted. If a solution is found (at any point) the values for the solution are added to a list. Again, so long as we are examining all possibilities, the recursion unwinds so that the next trial may be attempted. It is in this manner that we enumerate puzzles with multiple solutions.
Note that it is certainly possible to add to the list of applied deductive rules. The techniques known as "X-Wing" and "Swordfish" come to mind. On the other hand, adding these additional rules will, in all likelihood, slow the solver down by adding to the computational burden while producing very few results. Ive seen the law of diminishing returns even in some of the existing rules, e.g. in subset elimination I only look at two and three valued subsets because taking it any further than that degraded performance.
Enhancements:
- Code optimization has resulted in a 30% increase in speed.

Roster-in-a-Box project is a course management system designed to facilitate the use of autograded homework assignments, while also allowing for text-based questions to be submitted online and graded online by the instructor. I developed and currently use the system for my introductory statistics and microeconomics courses at Long Island University, and I have had it in production since 2005. While you will be able to break the program if you try hard enough, it is stable and very much ready for use.
I wrote the program because I wanted something simpler than Moodle (and also because my school was not supporting Moodle at the time that I started the project). I love Moodle, and Moodle may be right for you, but it wasnt right for me, because I didnt want the course management system to take over my course web site. Basically, Roster-in-a-Box handles the homework and grading functions with a couple of web pages and leaves you on your own to design the rest of your course web site. That may or may not be what you want.
It should be quite simple to take my statistics modules (and the forthcoming microeconomics modules that I just havent gotten around to packaging) and get your own introductory statistics course up in no time. It is also quite simple to set up a course that consists of only text-based, manually-graded questions. On the other hand, if you want to write auto-graded assignments for some other purpose, you will have to know how to code them yourself. The structure of the modules should be somewhat self-explanatory to experienced programmers, but is probably daunting to those who do not know how to code. The entire program is written in PHP, and uses MySQL as a back-end database.
Version restrictions:
- There are things you could do while editing the assignment list that would leave it in an inconsistent state. For example, if you leave a page open, then open up a different page and make edits in that page, and then go back to the first page and save your changes, you may screw things up. I will get around to fixing this problem at some point, but in the mean time try not to do things like that.
- The program uses the PHP session variable, which by default times out after 24 minutes (supposedly due to security concerns). You should bug the web site administrator to lengthen the PHP system setting session.gc_maxlifetime to be as long as possible.
- By default, the system resets to the Spring semester on January 1st, the Summmer semester on May 15th, and the Fall semester on September 1st. I should probably make these dates editable somewhere in site_settings.php, but instead youll have to dig through administer.php and homework.php if you want to change them.
Enhancements:
- This has been used in a production environment for two years now, but the code has never been released.

Sharpen plug-in provides a sharpening filter to enhance the edges in a blurry image.

Using the Sharpen Plug-In
Figure 1 shows the sharpen plug-in window. The scrollbars allow you to pan within the image (in this case to the back of the duck in the foreground). The preview window shows the filter output using the current settings.

The Sharpness control selects the amount of sharpening to apply, from 1 to 99 percent. Higher values make the edges in the image increasing distinct.