Thanks for the article. 🐬 PS: one thing that I saved in my brain, is that mysql can use only one index per table per query (I know there are some specials for joins and index merge)

count($a) === 0 is even more readable, or? 🤔

Does it show the results per file in the gitlab UI? Is this working for regular commits or only for pull requests?

I learned a lot from reading code from others, there are many great developers on github and many awesome open source projects. And it helps to read some books to better understand why these developers write the code like they do. Conference, Talks, Twitter, Meetups,... are helping to stay motivated, but you will learn a lot more in the time you try to fix a open issue from one of the awesome projects on github. 👍