Hi. I have a data class with three properties: `MyClass(groupId, datetime, someValue)` Next, I have ...

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[arve]

Hi. I have a data class with three properties: MyClass(groupId, datetime, someValue)
Next, I have a Set<MyClass>, which can contain multiple entries with the same groupId. I want to turn this into a Set<MyClass> that contains the latest(by datetime) entry for each groupId. What’s a good functional/stream-like way of achieving this?

[Andreas Sinz]

arve: something like Set<MyClass>.groupBy { it.datetime }.map { it.value[0] }