10 February 2018

Closing laptop lid does not lock screen on Void Linux

Void Linux is an amazing operating system which reminded me FreeBSD in Linux world. Many parts were built from scratch, like runit for init scripts, xbps for package management. And they are minimalistic which makes it even better. Void uses rolling release to delivers fresh packages on regular basis.


03 February 2018


A good friend of mine (let’s call him D.) asked if I could help his nephew V. with English essay. He studies in middle school in Russia. It’s not the first time V. did not do his homework. I recommended to copy some examples from google. It would be at least more useful for him rather than doing nothing. But he said that schoold checks homework for plagiarism. What?!


31 August 2017

Map matching 101 - part 1

Map matching is an interesting problem which is used in car navigation, self-driving cars, traffic analysis, map correction and more. Let’s write a simple map matching algorithm in Julia.


24 August 2017

Dialogues on size_type vs size_t

It all began, as usual, with a simple yes or no question on how to loop in C++. Which led to size_type vs size_t discussion and ended with a joke and a bit of assembly.


03 August 2017

Eneco or an example of terrible service

Eneco is one of the biggest energy company in the Netherlands. I’ve been using their services for quite some time. It was alright except phone calls from private numbers with offers to renew a contract (I bet there is a better way to do it). But recently they sent me a bill which questions competency of their workers and the company in general.


31 July 2017

What will probably kill you

Have you ever wondered what is probably going to kill you if you die at certiange age? Based on data from Statistics Netherlands (or Centraal Bureau voor de Statistiek) we could try to figure out main cause of death for different age groups.


17 July 2017


From wikipedia: In physics, chemistry and materials science, percolation refers to the movement and filtering of fluids through porous materials. Original problem was described by Broadbent and Hammersley in 1957: Will the water reach the center of the porous rock when it is submerged under water?


22 June 2017

Blocked by Hotmail/Outlook

Today I discovered that Hotmail/Outlook (live.com) does not want to receive my emails. Outgoing email bounced with error: host mx1.hotmail.com[] said: 550 SC-001 (SNT004-MC3F4) Unfortunately, messages from weren’t sent.