As a programmer, I don't know if it's still relevant to make a strict separation between programming paradigms. You can use immutable types, pure functions, closures and so on in most languages. Conversely, you can define mutable types and imperative code in most functional programming languages.
I'm always surprised reading comments on these topics, people saying they don't grasp FP. But don't we use higher-order functions, closures, combinators all the time in most mainstream languages? How hard can it be to learn OCaml or Clojure for someone who use closures all over the place in JS?
Monads have a steeper learning curve, but besides Haskell, they aren't that pervasive. And there are constructs with similar flavor in mainstream languages too (result types in Rust...)
I'm always surprised reading comments on these topics, people saying they don't grasp FP. But don't we use higher-order functions, closures, combinators all the time in most mainstream languages? How hard can it be to learn OCaml or Clojure for someone who use closures all over the place in JS?
Monads have a steeper learning curve, but besides Haskell, they aren't that pervasive. And there are constructs with similar flavor in mainstream languages too (result types in Rust...)