Lukasz Wrobel - Blog

tmux Tutorial - Split Terminal Windows Easily

Mon, 30 Apr 2012 19:20:35 +0000

Having just one terminal window is usually not enough. Even though having many windows (represented by tabs in Linux terminal-handling tools or by many Putty instances) can solve this problem, it is often desired to keep things in sight at the same time. For example, we may want to execute some code or tests and at the same time watch over log files by using tail.

tmux is (among screen and Terminator) one of the best tools for splitting terminal window. In this tutorial I'll show you how to begin work with tmux and how to adjust it to meet your requirements.

E-book proposals: winner announced

Sun, 11 Dec 2011 00:21:52 +0000

Two weeks ago I posted a short information concerning picking a topic for my Ruby-related e-book. I also included a link to a short, one-question survey and promised (in one of the comments) to post the results. So here they are!

E-book proposals

Fri, 25 Nov 2011 23:01:44 +0000

For some time, I've been wondering whether writing a Ruby-related e-book would be a good idea. I missed writing, and in particular I wanted to work on something more challenging than just a blog post. It didn't take too long for me to make the decision whether I should write at all, but then another problem appeared: what topic should I choose?

First, I chose the topic I considered to be the most interesting, but then I changed my mind. And then again. And again.

Finally, I thought that the most interesting topic should be interesting not only for me as an author, but also for my potential readers. And this is what I need you help with. Please open the Google form I've created and answer one simple question: what Ruby-related e-book would you like to read?

Thanks in advance for your answers.

Ternary Search Tree

Wed, 22 Dec 2010 21:06:08 +0000

Text algorithms offer different ways of efficient text representation, processing and lookup. Ternary search tree is one of the most interesting data structures in its field of knowledge, as it combines storage efficiency with fast lookups and ability to perform a prefix search. I'll show you how this type of tree works and propose an example Ruby implementation, covered with specs.

Ruby: Is nil?

Sat, 11 Sep 2010 10:34:25 +0000

How to check if given value is nil in Ruby? I'll show you not only how to do it, but also how it works in details. To be honest, explanation may seem a little bit confusing, especially for programmers having experience in other languages such as Java or C.

Curious readers may also read about an interesting feature of the Ruby interpreter, nil, true and false objects and their initialization.

Memcached and Ruby

Mon, 06 Sep 2010 20:16:53 +0000

Among filesystem and local memory, memcached is one of the most widely-used storage systems being adapted to cache data in web applications. I'll try to show different ways of integrating memcached with web applications in order to gain performance boost. Described techniques can be applied regardles of the framework (Ruby on Rails / Merb / Sinatra) and model layer library (ActiveRecord / DataMapper / Sequel) being used. I assume that reader has at least a basic understanding of what memcached is and how it can be used to store and retrieve data.

Unit Tests - Love, Ignorance and Getting Real

Tue, 09 Feb 2010 23:01:08 +0000

A careful consideration given to unit tests in a form of discussion between spokesmen of three attitudes: "Love", "Ignorance" and "Getting Real".

Which side are you on?

Interpreter Design Pattern

Mon, 07 Dec 2009 21:48:15 +0000

If you're tempted to create your own simple language in order to solve some specialized problem, then the Interpreter design pattern might be a reasonable choice.

Also, if you don't know what the AST tree is or if you're curious what the SQL language and the Interpreter pattern have in common, you should definitely read this article.

RuPy'09 Conference - Agenda is Complete

Sat, 24 Oct 2009 10:26:07 +0000

RuPy is the strongly dynamic conference concerning mostly Ruby and Python programming languages. Registration is open from some time and now we have also completed the agenda. There will be a load of talks and many geek world stars will come to talk about their experiences.

Read on if you're curious who's going to make a speech at RuPy'09.

Rake Tutorial

Tue, 14 Jul 2009 19:33:06 +0000

If you want to learn how to write Rake tasks, this tutorial is right for you!

You're going to learn what the build tools are in general. I will show you how to write your first simple Rake task and how to express dependencies between tasks. I will also cover some useful FileUtils methods.

Get intimate with Rake now!