Mostly adequate guide to FP (in JavaScript)

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  • The first bits of code I come across on this codebase isn't functional: You're modifying state. You're implementing iteration with do..while loops. That doesn't scream functional to me. Iteration is done with things like, Array.filter, Array.reduce in functional JS. Higher order functions are key. Functional code is declarative. do..while is imperative.

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  • I completely understand where you are coming from and don't doubt that you've seen some gross things built in the name of "functional Node". I do think that functional JS can be elegant when applied with restraint.

    I've really enjoyed creating functional pipelines with Ramda in the past for professional projects. I liked how I could use the Ramda functions to explicitly state in my code what the flow of data was with functions like pipe and converge. It seemed to me that being able to understand the dataflow was easier with this paradigm. I could even create pipelines that would automate away dealing with promises in my pipelines with pipeWith. I would implement the same bits of code in "vanilla" js and with Ramda and Ramda was more concise and easier to read (if you understood how Ramda worked...).

    You can see an example of the style that I like here: I definitely was more "clever" in parts of that codebase than I let myself be in a professional setting heh.

    I successfully onboarded a different team onto one of my projects when I was being switched to a different product at my company. An engineer who later did some maintenance work on it told me that the codebase was simple and easy to work with. I did get complaints about a later project that I implemented with Ramda from a person who was totally uninitiated and didn't bother to ask me for help..

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  • proposal-pipeline-operator

    A proposal for adding a useful pipe operator to JavaScript.

  • Both are active tc39 proposals :) - Stage 2 - Stage 1

    Hopefully we get both in the next couple of years.

  • proposal-pattern-matching

    Pattern matching syntax for ECMAScript

  • Both are active tc39 proposals :) - Stage 2 - Stage 1

    Hopefully we get both in the next couple of years.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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