My first exposure to any kind of functional programming was JavaScript’s array functions map(), filter(), and reduce(). I started using them almost any time I could, chaining them together and usually using lambdas. Looking at my code from back then, you’d think I was trying to see how much I could accomplish in a single statement, to the detriment of readability.
These days, I’m trying to pay more attention to whether the code is clear to the reader, even though the expressiveness afforded by functional programming styles can be addicting!