In recent years, I have encountered many problems in IT companies caused by incorrect software architecture. What do I mean ? In most cases, this is one direction – either it is too trivial or incredibly complicated in relation to the problem it is supposed to solve. Both cases lead to performance problems and stop the organization from being agile.What do I mean by software architecture? Before I start talking about the problems caused by...

During the development team life cycle, we encounter many problems related to the lack of timely communication. This can lead to regular high costs associated with changes that come too late, or with the progressive demotivation of each team member. Examples? A very long time of processing pull requests. Suppose person A is working on a particular feature. After a week of working alone (IMO not a good habit) he creates a PR. Another team member starts the review...

Recently, I had the pleasure of speaking at 2 programming events – World Engineering Days and one of the biggest software conferences in Poland, 4Developers. During both speeches, I talked about many different things related to the modern way of software development – continuous deployments, short-living branches, canary releases, and more. All are linked to the short feedback cycle. One of the side topics was vertical slices. What is a vertical slice? Before we ...

A fairly typical scenario – there is production software that was released some time ago. The entire development team works on a set of features that will be a part of the next release (no concept of continuous deployments is known). The deadline is coming. More and more work is added. Finally, the release date comes...

Imagine quite a common situation. You are a part of the development team. There is some kind of user story or a technical task that needs to be implemented. You create a branch for it. Your hard work has just started. After one week of development, you are finished with it. You have been synchronizing your branch with a main one (does not matter if this is development, stage, master or any other – a shared one) multiple times during your work or you did it just i...

~ MJ Jako, że jestem w trakcie certyfikacji MCSD – został mi ostatni egzamin – jestem na bieżąco ze wszelkimi informacjami tejże dotyczącymi. I tak, okazuje się, że ścieżka MCSD: Web Applications zostanie zlikwidowana wraz z końcem marca – dokładnie 31.03.2017 r. Co to w praktyce oznacza? Każdy, kto posiada certyfikat i jego status jest aktywny dnia 26.09.2016 r. lub zda egzamin po tej dacie, zachowa go. A co, jeżeli ktoś nie odnowił lub nie zrobił go przed 31.03.2017 r.? Nie ma o co się martwić. Nowa...

Reading time ~5 minutes In my ongoing series on calculating similarities one angle always seemed worth trying, and was pointed out many times on Reddit - use C++ and matrix manipulations. Similarity calculation fits very nicely into matrix representation, and there are algorithms targeting sparse matrix manipulation. So why did I delay it for so long? Because I had other angles I wanted to try and, from the looks of it required significant changes in the existing code base. But since last op...

~ MJ Stało się, 2016 rok przeszedł do historii. Jest to idealny moment na wszelkie podsumowania. Jak to wyglądało z mojej strony?

~ MJ Człowiek cieszy się, jak widzi ile w ciągu ostatnich 2 lat powstało blogów programistycznych. W porównaniu do tego co pamiętam, gdy sam zakładałem swojego – a było to przecież tak niedawno, w 2010 roku – jest taka różnica, jak między koniem,

~ MJ Jednym z mniej znanych i dość mocno zapomnianych – subiektywna opinia – przez środowisko programistów jest prawo Demeter. W potocznym języku – zasada jednej kropki. Cóż to takiego?...