Haskell Lens Tutorial by Exercises

This page summarizes the projects mentioned and recommended in the original post on news.ycombinator.com

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  • lens

    Lenses, Folds, and Traversals - Join us on web.libera.chat #haskell-lens (by ekmett)

    They are in fact well structured and not random at all. Take a look at this:


  • monocle-ts

    Functional optics: a (partial) porting of Scala monocle

    For anyone - anyone who's faffed around with JavaScript's spread syntax when working with nested immutable data, anyway - struggling to understand the general concept or utility of lenses, I'd encourage looking into monocle-ts. The motivation [0] that kicks off the README instantly made me a believer, and TypeScript's idiosyncratic type system makes using the library remarkably natural; it fits right in without needing to deal with anything analogous to Template Haskell.

    [0] https://github.com/gcanti/monocle-ts#motivation

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