:mega: :mega: :mega: `kotlinx.coroutines` 1.2.0 is here! Changelog: * Kotlin 1.3.30 * New API: `C...

# coroutines

[Vsevolod Tolstopyatov [JB]]

📣 📣 📣 kotlinx.coroutines 1.2.0 is here!

Changelog:
* Kotlin 1.3.30
* New API: CancellableContinuation.resume with onCancelling lambda to consistently handle closeable resources.
* Flow improvements, including new operators, better documentation and RxJava integration. Note that it is not leaving its experimental status yet.

Full changelog: https://github.com/Kotlin/kotlinx.coroutines/releases/tag/1.2.0

[sdeleuze]

Congrats. Could you give us more details about the reasons of « flatMap, merge and concatenate are replaced with flattenConcat, flattenMerge, flatMapConcat and flatMapMerge. » ?

[elizarov]

The chief reason is that we have conflicting evidence on what flatMap is expected to do (should it concat or merge), so this way we can defer making this decision.

[elizarov]

That's a possibility if in the end we decide that flatMap should do flatMapMerge. The downside of that decision is that if you copy-and-paste a code written with Sequence to Flow then suddenly it starts working differently, because flatMap for sequences is flatMapConcat.