Hi, I am Jan. This is my old Ruby blog. I still post about Ruby, but I now do it on idiosyncratic-ruby.com. You should also install Irbtools to improve your IRB.

Ruby Brainfuck golf [Update]

September 2009, ruby · ruby1-8 · fun · golf

Some days ago, I discovered a website – which is the most addicting one I know :) – codegolf.com. The goal is, to solve programming problems with as short code as possible.

As I said, it is addicting. You do not write better ruby code by golfing. But you can really improve the knowledge of the language. And it is fun :)

Brainfuck

After doing some of the other challenges I tried the brainfuck challenge.
Brainfuck is a Turing-complete esoteric programming language consisting only of 8 letters, operating on a 30000 cells-array. This is the hello world program:

>+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]>++++++++[<++++>-]
<.>+++++++++++[<++++++++>-]<-.--------.+++.------.--------.[-]>++++++++[<++++>-
]<+.[-]++++++++++.

The goal is to build a interpreter.

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Quicksort in 5 minutes

September 2009, ruby · hints · algorithm

Some time ago, I conducted a short presentation about Ruby. And to impress the audience, I did some live coding and implemented the quicksort algorithm in 5 minutes. They were impressed :)

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Troubleshooting an aegis-permission problem

September 2009, ruby · gem · rails · hints

In my current Rails project, I use the aegis gem for rights management. And I almost got mad, wondering, why it wouldn’t work..

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PlasmaRails.org

September 2009, rails · rails3 · rbJL · docs · plasmarails

PlasmaRails.org is an online RDoc for Edge Rails, which is regenerated every day. It is based on sdoc with some custom css.

Update 06.06.2010: Relaunched with better stylesheets!

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