Category Programming
Scientific method
In 50′ and 60′ input data for programs from those years were written on paper tapes or punch cards. Writing code, compiling and testing loop took from a few hours to even few days. It was the beginning of programming we know it. At this time Dijkstra started his discovery. He conceived the algorithm called his name. He also noticed that programs become too complicated to be fully understood by one person.
Entity and value object
Knowing the basics is the key to understanding more complex concepts. After reading this post you will know what are entities and value objects and find out differences between them. When you pay for something at a shop it’s not important which exactly coin you choose. The most important thing to the shop assistant is their value. It does not matter if you give him coin from the left or right pocket.
Services in DDD finally explained
I’ve noticed that there is always a challenge of understanding what services are in a context of Domain-Driven Development and what is the difference between a service in an application, domain, and infrastructure layer. Domain-driven design made a lot of cleanup in the IT environment and conquered the hearts of programmers. Eric Evans is one of the most famous people who promote this not so a new way of developing software.
Mutational tests
When you have a very simple application it’s not so important to test every edge case but in a project, in the very complex domain, the priority of it will increase. The more high-quality the tests, the more high-quality the code. Mutational tests will help you with making sure you did not miss some a variant of the flow in your code. How it works Mutational testing is a test which runs other test several times but with a bit changed production code in every iteration.