Lenses in Haskell

1. DataFixerUpper

   1 13 1,212 7.9 Java

   A set of utilities designed for incremental building, merging and optimization of data transformations.

   

2. CodeRabbit

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3. hoogle

   2 65 763 3.2 Haskell

   Haskell API search engine

   

   Point of clarification for readers who aren’t familiar with Haskell:

   Haskell doesn’t have operators in the classic sense, since they’re just an alternate syntax (infix) for regular functions; implemented in libraries. The Haskell ecosystem OTOH has a shitton of infix functions, as does Edward Kmett’s lens library. I don’t think there’s any reason to bother memorizing the ones that aren’t useful to you. You can always search them on Hoogle if you encounter one you don’t know. E.g. https://hoogle.haskell.org/?hoogle=%28%5E.%29&scope=set%3Ast...

   I use lenses frequently in a large application and have only ever used view, set, and over.

4. Immer

   3 150 28,164 7.0 JavaScript

   Create the next immutable state by mutating the current one

   

   This is basically what Immer [0] does for Javascript apps if you use immutable-like libraries like Redux which expect a new object created every time a property changes so that it can detect that it's changed and propagate that to any observing components.

   Perhaps Haskell needs something similar.

   [0] https://github.com/immerjs/immer

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