> Functional programming's great when you have immutability to drop an entire class of bugs and the mental energy that accompanies that, can pass-around and com

> Functional programming's great when you have immutability to drop an entire class of bugs and the mental energy that accompanies that, can pass-around and compose-with small functions easily which makes writing, testing and figuring much simpler and can make your brain click that "its all data" without trying to over complicate it by attaching methods to it. A hundred percent. FP for me, is "let's stop gluing state and functions together for no reason" and get all the benefits above. I understand pure functions, avoiding state, closures, and using first class functions as the basic building blocks of creating higher level structures. When it becomes "a functor is a monoid of the schlerm frumulet" - ala the typical FP advocacy blog / latest React state management manifesto masquerading as library documentation, I zone out. The odd thing is, I don't feel I've lost anything by doing so.