A Guide to Process-oriented Programming in Elixir and OTP

People like to categorize programming languages into paradigms. There are object-oriented (OO) languages, imperative languages, functional languages, etc. This can be helpful in figuring out which languages solve similar problems, and what types of problems a language is intended to solve.

In each case a paradigm generally has one “main” focus and technique that is the driving force for that family of languages:

• In OO languages, it is the class or object as a way to encapsulate state (data) with manipulation of that state (methods).
• In functional languages, it can be the manipulation of functions themselves or the immutable data passed from function to function.

While Elixir (and Erlang before it) are often categorized as functional languages because they exhibit the immutable data common to functional languages, I would submit they represent a separate paradigm from many functional languages. They exist and are adopted because of the existence of OTP, and so I would categorize them as process-oriented languages.

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Eight CSS Tips for Advanced Layouts and Effects

The realm of web front-end development has made considerable progress over the last few years. However, the web front-end, as the users see it, is still the same: HTML markup styled with CSS.

Many layout problems can seem simple at first but often proves to be tricky. Without extensive knowledge of how certain CSS features work, these advanced layouts can seem impossible to achieve with CSS alone.

Eight Rules for Effective Software Production

During the course of my career, I’ve participated in multiple real life software projects and observed how things are done on all levels: decision making, practices adoption, team building, recruiting, skill distribution, etc. Obviously, different approaches yielded different results. Being an improvement-oriented type of person, I noticed and collected the most effective practices and best practical tricks to help me up in my work.

Learning from observation is a hard and lengthy way to do it. I would be extremely happy to pick this knowledge earlier from books instead. Unfortunately, I found none on the topic. So I decided to share my experience with other seekers of this kind of knowledge. Hopefully, it’ll save them few years of personal research.

Fix display size on libvirt/Qemu guest

Lot of times I find myself of VM that does not correctly resize the screen display and that is literally nuisance. So, here is quick and dirty fix for this.

First you need to find out information about your display with following command:

xrandr -q

And you will see output like this:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
Virtual-0 connected primary 1920×1080+0+0 0mm x 0mm
1024×768      59.92 +
1920×1200     59.88
1920×1080     59.96*
1600×1200     59.87
1680×1050     59.95
1400×1050     59.98
1280×1024     59.89
1440×900      59.89
1280×960      59.94
1280×854      59.89
1280×800      59.81
1280×720      59.86
1152×768      59.78
800×600       59.86
848×480       59.66
720×480       59.71
640×480       59.38
Virtual-1 disconnected
Virtual-2 disconnected
Virtual-3 disconnected

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Getting Started with Elixir Programming Language

If you have been reading blog posts, hacker news threads, your favorite developers tweets or listening to podcasts, at this point you’ve probably heard about the Elixir programming language. The language was created by José Valim, a well known developer in the open-source world. You may know him from the Ruby on Rails MVC framework or from devise and simple_form ruby gems him and his co-workers from the Plataformatec have been working on in the last few years.

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