My Entry to "Daj Się Poznać" Competition

In this blog post I intent to give a brief overview of “Daj się poznać” competition and some reasoning why I decided to join it. Few words about ”Daj Się Poznać” “Daj się poznać” (in English: “Let yourself known”) is a competition aimed at Polish programming community and it’s idea is to help programmers to be more involved in both blogging and open source work. Currently it’s aimed only at the polish market, so all content on the official website is in Polish, most of the participants are blogging in Polish, only few in English.

Tips And Tricks For Making A Successful Pecha Kucha Talk

This weekend I have my first Pecha Kucha talk and I figured that it would be a good idea to write down my thoughts and suggestions on how to prepare better and also deliver a good talk in this format. Just to remind you, a Pecha Kucha talk is a format for giving a presentation where you have 20 slides, each slide is presented on screen for 20 seconds, slides change without your control, as a result whole talk takes 6 minutes 40 seconds.

Slides from my talk: Introduction to Ionic 2

Yesterday I gave a talk at ng-wrocław meetup ”Ionic 2 - Intro” The presentation took about 50 minutes, during that time I gave a quick introduction the the ionic 2 framework (based on the following slides), then I have shown my project “Daily Gifs” that is available on github: Bitcoin for programmers - part 1 version 2 from Wojciech Langiewicz

Getting Started With And TypeScript - Boilerplate Project

In order to help me and others with starting game development with and TypeScript, I have created a boilerplate project on github: that can be used to jump-start game development. Just clone or download a zipped archive of the repository, then start writing your game - README file has more detailed information how to use it. I have added following components: npm commands for running project in development and production mode

Slides From My Talk: Mutation Testing In Java

Few weeks ago I have a talk at conference called “33rd Degree 4 Charity” which was a 2 day event held in Wroclaw. These are my slides (there is no recording): Bitcoin for programmers - part 1 version 2 from Wojciech Langiewicz The related sample project that I used as a demo is here: If you are interested in this topic you’ll get most out of it if you clone the project, run it locally and analyze the results (everything is explained in the README.

Fix screen flashing problem with redshift

As an alternative to flux I use redshift on my Linux machine. Recently I stumbled upon very weird problem – each time I close Java desktop app and redshift was active, the screen flashed. It was a very quick change that looked like redshift was disabled and then enabled again. I was starting redshift like this: redshift-gtk -l manual -l 51.126:17.033 After trying out few configuration options it turns out that changing video method to vidmode was the right solution for my problem:

Commitment scheme lighting talk

Yesterday I gave a lighting talk “Commitment scheme” The talk was give at DRUG #62. The lighting talk ended up taking almost 1h because we started to discuss how to organize elections based on commitment scheme principles. Bitcoin for programmers - part 1 version 2 from Wojciech Langiewicz

Recommended Resources For Learning Bitcoin

In the recent weeks I did have many people asking me for recommender resources for learning Bitcoin from the techology side. Here is a list of learning resources that I can recommend: “Mastering Bitcoin” by Andreas M. Antonopoulos, purchase link:, free version online: This is a very approachable for anyone wanting to learn details of how Bitcoin works under the hood, so far I have read it twice 🙂

Introduction to Bitcoin for programmers part 1 version 2

Few days ago I have gave a “Introduction to Bitcoin for programmers” talk once again, today with updates and improvements. The talk was give at DRUG #61 which was and after-after party after wroc_love.rb conference. Bitcoin for programmers - part 1 version 2 from Wojciech Langiewicz