You have a matrix of N rows and M columns. There are 3 possible outcomes in every position. A) There can be a dot, which means that you can go on this position B) There can be a plus sign (+) , which means you went to see an autoshow C) There can be a ladder sign, which represents the not availab...

This is my first challenge, so I'm keeping it fairly simple. If you've ever typed telnet towel.blinkenlights.nl on your command line and pressed enter, you will have experienced the joy of asciimation. Asciimation is, quite simply, doing an animation with ascii art. Today we will be doing a very...

I am going through a old book 'How to Solve it by Computer' by R. G. Dromey. In this book he has explained a simple algo to find the smallest divisor of a number. The algo is straight forward and goes like this See if it is divisble by 2, If yes terminate If not divisible by 2, then start a loo...

Who needs a GUI anyway? code-golf ascii-art Most people like GUI's. You don't. They say that GUI's show them pretty pictures. Your task: Write a program that displays said image in full 256-colour ANSI art in the terminal. Because you need to show them your leet skillz at programming, you h...

Every Unicode character has a name, like "LATIN CAPITAL LETTER A". A Unicode character name may contain only uppercase letters, white spaces, and the minus sign. Write a program that reads a text and outputs the names of each character on a new line. For example, if the input were "Hello, World!...

Background The official currency of the imaginary nation of Golfenistan is the foo, and there are only three kinds of coins in circulation: 3 foos, 7 foos and 8 foos. One can see that it's not possible to pay certain amounts, like 4 foos, using these coins. Nevertheless, all large enough amounts...

I read about circles (it's actually a pretty common concept) somewhere and thought about codegolf. Your task is to randomize a point in a unit circle in the most creative way. Rules: All points must have an equal probability to be generated Floating point coordinates must be used; the minimu...

We have a database with 3 tables Users, Roles and UserRoles that will be referenced throughout the below questions: Describe in non-technical words the relationship between each table. What is the purpose of the UserRoles table, what is this kind of table called? Write a query which displays...

Enough jQuery? As a general rule of thumb, jQuery is a vital part of any program. It is really great and does all things. Your job, as a quality-control expert, is to ensure that a given program meets industry standards. Only programs that use jQuery are eligible for your seal of approval. T...

After noticing that our site hasn't had a challenge on the Coin Problem, I recently posted one. However, it was pointed out that the challenge was posted on Stack Overflow back in the day when codegolf.SE didn't yet exist and such challenges were accepted on SO. The old challenge has a fair amoun...

The interpreter executable for FALSE is 1020 bytes large. I think we can do better than THIS: ��Û������������������ˆ��È���ˆB0�ˇ*,x�r�pH@NÆ˝T,�g�Œ$F(FIÏa®.GÏu0C˙íp%NÆ˝ÿJÄg�™,@"$<��ÌNÆˇ‚JÄg�í*�"�$&<��a®NÆˇ÷,�"NÆˇ‹F�k�r‹Ç*BA˙¸C˙Ra�ºª∆j��Úp�@�0j�^@�[f(¸A˙�8¸+(¸`�ˇ¯&Ã`‘@�]f8¸Nu c êàTÄ1@ˇ˛`º@�aj�T@�!k...

Assume we have a code: puts eval(OurCode) The variable OurCode should be using only abcdefghijklmnopqrstuvwxyz, space, and new line. Can we write a code that would read the list of files in the current directory? I have been told it's possible in Ruby, sort of 100% sure about it.

This is a code-golf challenge whereby you need to devise a program that acts like a quine or a quine that modifies itself to illustrate machine learning. Background There is a basic artificial intelligence program called 'the pangolin game' which is described here. The basic ideas is that the p...