ARROW 2.0 IS HERE!!! - release highlights in video <https://www.youtube.com/watch?v=2sfnDkPWoUw> - r...

# arrow

[Alejandro Serrano.Mena]

ARROW 2.0 IS HERE!!!
• release highlights in video

https://www.youtube.com/watch?v=2sfnDkPWoUw▾

• release announcement https://arrow-kt.io/community/blog/2024/12/05/arrow-2-0/

[Michael Kaiser]

What I noticed and missed so far:
You should also mention in the release announcement, that the libraries were split up into specialised ones as you do in the video!
Also, arrow.fx.coroutines.Atomic, changed quite a lot but I couldn't find any advice for migration! 😔
e.g. unsafe and modify weren't deprecated, but do not exist in 2.0.
`unsafe`is easy as it can just be replaced by invoke.
But modify doesn't look like it has a in place replacement. :-/

[Alejandro Serrano.Mena]

I definitely forgot atomic, but that transition happened some time ago...

anyway, instead of modify you can use getAndUpdate https://apidocs.arrow-kt.io/arrow-atomic/arrow.atomic/get-and-update.html or updateAndGet https://apidocs.arrow-kt.io/arrow-atomic/arrow.atomic/update-and-get.html

[Michael Kaiser]

sadly no...
with `modify`it was possible to return any other type, which we made use of in that case. I fixed it by copying the original modify from 1.2.4 as a extension function to our code base.

fun <A, B> Atomic<A>.modify(f: (A) -> Pair<A, B>): B {
    tailrec fun go(): B {
        val a = this.get()
        val (u, b) = f(a)
        return if (!this.compareAndSet(a, u)) go() else b
    }
    return go()
}