monocle-ts
proposal-deep-path-properties-for-re | monocle-ts | |
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2 | 7 | |
- | 1,016 | |
- | - | |
- | 0.0 | |
- | over 1 year ago | |
TypeScript | ||
- | MIT License |
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proposal-deep-path-properties-for-re
- Deep Cloning Objects in JavaScript, the Modern Way
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ES2022 feature: class static initialization blocks
Oh, I like that a lot, especially as they've proposed a new JSON.parseImmutable() method as well. The syntax is surprisingly simple (and obvious!) and deep equality and simple comparisons is perfect.
Deep paths look interesting on top of this, the idea is one I like but not sold on it being implementable in any sort of non-clunky way.
https://github.com/tc39/proposal-deep-path-properties-for-re...
monocle-ts
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Deep Cloning Objects in JavaScript, the Modern Way
Instead of the "deep path properties" syntax, you might want to take the opportunity to learn about functional lenses with monocle-ts
https://gcanti.github.io/monocle-ts/
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I may have a crush on the TypeScript compiler, because of stuff like this
You may be interested also in checking out the implementation of Lens in monocle-ts, one of the libraries in the fp-ts ecosystem
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Haskell Lens Tutorial by Exercises
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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Is there a cleaner way to immutably update a deeply nested attribute? (I feel like this is not very clean)
You could have a look at the monocle-ts library. It was designed to deal with this kind of problem.
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Simple Immutable Data w/ Spectacles π
spectacles-ts integrates seamlessly with the fp-ts ecosystem (it's built on top of the excellent monocle-ts library)
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Why is it so difficult to modify a deeply nested state in React?
lenses help with this quite a bit, check out monocle-ts
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You could have invented lenses!
You notice that Getters are composable as they are just pure functions, but the fact that setters are mutating values is not that nice. Tho, at this point we have invented quasi mutable lenses and If you really want you might invent actual purely functional lenses as well, but thatβs for another day. Meanwhile you can take a look at an actual typescript lesses library from @gcanti / monocle-ts.
What are some alternatives?
mutative - Efficient immutable updates, 2-6x faster than naive handcrafted reducer, and more than 10x faster than Immer.
optics-ts - Type-safe, ergonomic, polymorphic optics for TypeScript
proposal-operator-overloading
zustand - π» Bear necessities for state management in React
LJSON - JSON extended with pure functions.
spectacles-ts - Practical Optics β’ Unfancy monocle-ts
immutability-helper - mutate a copy of data without changing the original source
fp-ts-contrib - A community driven utility package for fp-ts
fp-ts - Functional programming in TypeScript
valtio - π Valtio makes proxy-state simple for React and Vanilla
reatom - Reatom - the ultimate state manager
jotai - π» Primitive and flexible state management for React