27. 06. 2022.

Covariance and seven OOPLs

The topic is the covariance of non-generic parameters in seven OOP languages: C++, Eiffel, Java, C#, Scala, Kotlin, Swift (the order is from oldest to youngest).

24. 01. 2022.

ARM architecture and Oracle

ARM ISA processors are no longer used “only” for mobile phones and tablets, but also for server computers (even supercomputers) and laptops/desktops.
Apple has also switched from Intel to ARM on Macintosh computers.

20. 10. 2021.

How can a hotel housekeeping management application help during a pandemic?

The hotel housekeeping is one of the key departments in the organizational structure of the hotel. Hotel room represents a temporary home for every guest, and the home is a place where everyone should feel safe and comfortable. This has particularly came to the fore now, during the global pandemic.

20. 10. 2021.

Ant and honey on the prism and cylinder – part 2

After an interesting concept of a mathematical game in which it is necessary to determine: “What is the shortest path between an ant and a drop of honey?”, the author encounters more mathematical secrets…

19. 10. 2021.

Do cows eat grass?

The topic is the covariance of non-generic parameters in the languages PL/SQL, C ++, Eiffel, Java, Scala, Kotlin (except PL/SQL, the order of other languages is the order of their occurrence).

30. 10. 2019.

Functional paradigm and databases

The paper contains a review of functional and logic programming, and to get some ideas from functional programming may be applied to database programming.