monocle-ts
lens
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monocle-ts | lens | |
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7 | 4 | |
1,016 | 1,982 | |
- | - | |
0.0 | 6.8 | |
over 1 year ago | 4 days ago | |
TypeScript | Haskell | |
MIT License | BSD 2-clause "Simplified" License |
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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.
lens
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Haskell Lens Tutorial by Exercises
They are in fact well structured and not random at all. Take a look at this:
https://github.com/ekmett/lens/wiki/Operators
- -- /It puts the state in the monad or it gets the hose again./
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How to learn OOP?
A composition of functional operations over Kmett style lenses. Here's the original Haskell implementation, here's usage in JS via Ramda
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Dhall: A Gateway Drug to Haskell
The documentation of lenses is geared towards people know what lenses are. Of course this single fragment of documentation doesn't make sense if you don't know what lenses are. If you want to understand what lenses are the package links to a helpful wiki and tutorial: https://github.com/ekmett/lens/wiki/Overview
All within reach within seconds of discovering the function.
What are some alternatives?
optics-ts - Type-safe, ergonomic, polymorphic optics for TypeScript
proxy - proxy 'helpers'
zustand - π» Bear necessities for state management in React
algebraic-classes - Conversions between algebraic classes and F-algebras.
spectacles-ts - Practical Optics β’ Unfancy monocle-ts
hexml-lens - Lenses for working with XML data
immutability-helper - mutate a copy of data without changing the original source
RFC1751 - RFC-1751 library for Haskell
fp-ts-contrib - A community driven utility package for fp-ts
double-metaphone
valtio - π Valtio makes proxy-state simple for React and Vanilla
proxy - This repository contains the WhatsApp proxy implementation for users to host their own proxy infrastructure to connect to WhatsApp for chat (VoIP is not currently supported)