Raport 2/2018: krótki przegląd rynku pracy IT

Drogi Czytelniku tym razem zobaczymy jak wygląda nasz rodzimy rynek pracy. Nie będzie to poważne studium poparte wieloletnimi badaniami, a raczej szybkie spojrzenie na obecną sytuację. Zobaczymy jakie oferty czekają na specjalistów IT i które specjalizacje są najbardziej pożądane na rynku pracy.
Czytaj dalej Raport 2/2018: krótki przegląd rynku pracy IT

std::vector vs sorted std::vector vs std::set

In this short article I’m going to make a comparison between std::vector, sorted std::vector and std::set. However, I’m going to focus only on one aspect – which collection is faster during lookup.

Looks like the answer is rather trivial – std::map and sorted std::vector offer access to any element in O(log n) time while unsorted std::vector offers linear finding. To be precise – std::vector + std::find as std::vector doesn’t have built-in find function. Indeed, sorted collections are winners… Or maybe the answer is not so trivial? Czytaj dalej std::vector vs sorted std::vector vs std::set

New word order – sorting

Almost every modern language comes with sorting procedures. Is there any reason to dive into?

Very often it doesn’t matter which sorting procedure we select. Especially when we’re sorting a relatively small set of data, say, less than 1000 records, and the performance is not critical. Moreover, some languages give no options but one sorting procedure (taking into consideration only basic language facilities).

But what if we have gigabytes to be sorted? Let’s check out that case. Czytaj dalej New word order – sorting

Ethereal stuff – volatile

In this article I’m going to share some details about the volatile keyword available in a number of programming languages like C++, C, Java. During my professional career, I have found out that the volatile type qualifier is frequently misunderstood and, what is even worse, incorrectly used (leading to nasty bugs).

I’ll show the differences between C/C++ and Java languages and present some examples. However, this is not a definitive guide. The main purpose of this article is to give some overview and highlight potential problems.

The volatile keyword differs from language to language, thus we can’t just write one definition for all. Fortunately, the volatile type identifier serves the same purpose in C and C++ (albeit C++ slightly extends the definition). Czytaj dalej Ethereal stuff – volatile