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.

Idiosyncratic Ruby

May 2015, one-liners · regex · golf · fun · docs · irb · thoughts · tutorial · hints · stdlib · ruby

For the whole of May, I will blog about weird things in Ruby over at Idiosyncratic Ruby – Don’t miss it!

What's in your Gemfile?

August 2012, ruby · working-environment · fun · gist

A little #whyday project, finished at eurucamp 2012, that displays the urls and summaries of all the gems of a Gemfile. Put the code somewhere in your $PATH (I keep little helper scripts like this one in ~/r) and run gemfile from within a the project.

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Do you know the official Ruby interpreter "goruby"?

August 2010, ruby · ruby1-9 · fun · golf · regex

##              ##    ##     ##    ##    ##    ####           ###        ##    ##
 ##            ##     ##     ##     ##  ##     ##  ##        ## ##        ##  ##
  ##    ##    ##      #########      ####      ##   ##     #########       ####
   ##  ####  ##       ##     ##       ##       ##  ##      ##     ##        ##
    ####  ####        ##     ##       ##       ####       ##       ##       ##

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Project Euler 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 (Ruby)

July 2010, ruby · ruby1-9 · hints · tutorial · fun · one-liners · euler

More solutions for the projecteuler.net problems. Some of them are solved using 1.9.2 features.

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A* in Brainfuck! by Thammi

October 2009, fun

Yeah! I am one of the two winners of the programming competition I talked about at Playing with Dijkstra.

Furthermore, Thammi, a friend of mine, is the winner of the category “crazy” with a brainfuck implementation!

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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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