[Myrmornis]

It's a cheap and shallow shot you're making, criticizing the article for using facebook likes as an example. I'm a programmer with some math background but who has never tried hard to understand the more theoretical sides of languages like scala. The article is a very good, even slightly inspirational, introduction to how category-theory type thinking can arise when you start to abstract some common patterns in programming. The author clearly went to a lot of effort to make this explanation available, and obviously not in her/his native language either.

Anyone put off by some of the negative responses in this thread, note that among the people saying "FP isn't necessary/helpful in real-world programming" the same people are saying "but understanding this stuff is very helpful to your development as a programmer".