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I'll add to the thanks for writing this! While I'm happy to be corrected, I get the impression that the 'threshold' for calling something FP, by those who consider themselves FP 'practitioners', lies somewhere in the area you describe right before Haskell. And for those who consider FP-style programming alien, Haskell is what they imagine. Basically, Javascript would be considered barely-enough to do FP style programming, but it's got the kitchen-sink nature against it, offering too easy an escape hatch. Clojure/Lisp and perhaps Elixir more-so, would be squarely in the FP world, even though they're not strict about it. I'm not too familiar with the former, but the latter makes it rather inconvenient to not write most of your code in a functional style. Personally my next goal is to go full-on FP and dive into Haskell (or something else, if someone would recommend it!), but Elixir has been the most useful language in my journey so far. I come from Javascript (and before that PHP), and while I've always tried doing things the FP way as much as possible, it's only after getting comfortable with Elixir that I've actually started to 'think functionally'. I feel it's greatly improved my programming even when I go back to JS stuff, because I'm less likely to fall back on the imperative/OO stuff. I'm not saying the latter is bad, but at the very least being consistent in my approach seems to bear fruit. |