Ask HN: How will pure functional languages impact the web? (PureScript and Elm)

itamarst · on June 12, 2017

They won't impact the web because they have no side-effects.

(Sorry, couldn't resist the joke.)

purescript · on June 12, 2017

Just model this as taking an old, immutable web to a new one.

    impact :: Web -> Web

Persistent data structures will let us reuse the best parts of the old web efficiently.

dreamdu5t · on June 13, 2017

In the short term, not much because there is a lot of inertia behind organizational programming knowledge, and the target runtime influences language choice (why JavaScript has become popular).

In the long term, I think expressive type systems will dominate programming. Simply because they allow programmers to provably generate correct programs without bugs. If the industry always used languages with a type system expressive enough to fit their needs, horrible errors like WannaCry would be eliminated (a classic buffer over-read due to programming with inadequate types). Of course, pure functional languages are at the forefront of type systems, though they aren't mutually exclusive (Rust for example).

hultner · on June 12, 2017

Update: Links in the article isn't clickable so I've attached them below as well.

[1] http://elm-lang.org/

[2] http://www.purescript.org/

[3] https://github.com/ghcjs/ghcjs

[4] https://haste-lang.org/

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I've previously been programming in Haskell and lisps before that so I have some experience with functional programming. From my experience the Haskell to JavaScript compilers aren't great in practicality as they provide a quite clunky developer experience and does not feel native to the web.

Elm and PureScript however integrates almost seamlessly and Elm in particular provides a smooth developer experience. I also find a nice resource[1] which eases the transition for a haskell developer.

Would love to hear your thoughts!

[1] https://github.com/eeue56/haskell-to-elm