Immer – A library of persistent and immutable data structures written in C++

Waterluvian 11 hours ago | parent | next [-]

Any sense how, if at all, C++ Immer and JS Immer relate as projects? They’re basically meant to be the same thing but I haven’t found either acknowledging the other.

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acemarke 10 hours ago | parent | next [-]

Completely unrelated.

- Immer (C++) appears to be roughly equivalent to Immutable.js ( https://immutable-js.com/ ): a set of specialized data structures

- Immer (JS), on the other hand, uses JS Proxies to wrap plain values, traps attempted mutations, and then replays them to return a safely immutable updated final result

As far as I know, Michel Weststrate came up with the name independently (although I can't 100% confirm that).

(source: I didn't create Immer (JS), but I started using it in Redux Toolkit in 2018, am quoted in the docs about how much I love it, spent the last couple months doing performance optimization work that got shipped in Immer 11.x, and just put up some more bugfix PRs today. I'm a secondary maintainer at this point.)

	▲	benoits 4 hours ago \| parent [-]
		Thanks for your work, really appreciated the RTK perf boost!

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eru 10 hours ago | parent | prev [-]

'Immer' is just German for 'always' or 'eternal'. So giving that name to your library of persistent and immutable data structures is a fairly natural thing to do, without them having anything more in common than that.

(Of course, they might have more in common, I don't know.)