Functional Programming – How and Why

• AdventOfCode

  1 3 7.5 Haskell

  https://adventofcode.com/2019 (by cronin101)

I built up a map of "where to go next and how far left" and flood-filled it starting from the end and looking at plausible neighbours for each step until convergence, which ended up being super useful for Part 2 since I got it "for free":

https://github.com/cronin101/AdventOfCode/blob/master/2022/D...

Day 13 on the other hand is something I'm far less ashamed of and really lets Haskell shine, it basically didn't need any code at all. I just defined how to parse an equivalent data representation, how it was sorted Eq/Ord typeclass (following the brief), and used `compare` to do the lifting.

    instance Eq PacketData where

• DefinitelyTyped

  158 47,143 10.0 TypeScript

  The repository for high quality TypeScript type definitions.

  

The library itself is fine. The problem I see is twisting JS/TS in to a language it is not.

JS simply does not lend itself to currying, data-last signatures, piping, and pattern matching like an ML family language does. And as you can tell by the Ramda typings, neither does the TS type system. [0]

You will forever fight an uphill battle against every single tutorial and piece of documentation and colleague when going down this path. I don't think the effort is worth it.

0 - https://github.com/DefinitelyTyped/DefinitelyTyped/blob/dc9b...

• InfluxDB

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• proposal-pipeline-operator

  102 7,382 2.7 HTML

  A proposal for adding a useful pipe operator to JavaScript.

  

Pipes and pattern matching have been proposed to JS.

https://github.com/tc39/proposal-pipeline-operator

• proposal-pattern-matching

  67 5,344 9.0 HTML

  Pattern matching syntax for ECMAScript

  

https://github.com/tc39/proposal-pattern-matching

• proposal-iterator-helpers

  35 1,242 5.0 HTML

  Methods for working with iterators in ECMAScript

  

As much as I like these concepts, I'd be hesitant about adding them to the language. At what point does a language support too many paradigms?

In contrast, take the recently stage-3'd Iterator Helpers[0]. These build on top of the language by using methods that already exists in other parts. It feels natural and is more of the same.

0 - https://github.com/tc39/proposal-iterator-helpers#implementa...

• SaaSHub

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