https://hackernoon.com/two-years-of-functional-programming-in-javascript-lessons-learned-1851667c726

The article is not about learning FP principles or JavaScript FP libraries. There are numerous of good articles on this topic out there. The article is about adventures and consequences of switching to functional JS in one project.

When this story started, I was already a professional programmer with 10+ years of experience. C++, then C#, then Python. I was able to program anything. My confidence in patterns and principles I have obtained extended to a point where I saw no rationale to learn something new. “I know 90% of good parts in programming,” I thought.