What is functional programming?
It produces programs by composing mathematical functions and avoids shared state & mutable data.
- Good to hear: Pure functions/function purity; Avoid side-effects; Simple function composition; Examples of functional languages: Lisp, ML, Haskell, Erlang, Clojure, Elm, F Sharp, OCaml, et.; Mention of features that support FP: first-class functions, higher-order functions, functions as arguments/values.
- Red flags: No mention of pure functions / avoiding side-effects; Unable to provide examples of functional programming languages; Unable to identify the features of JavaScript that enable FP.
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