how would you flatten ```val x = List lt Map lt Long Set lt kotlinlang #arrow

how would you flatten ```val x = List<Map<L...

Fred Friis

07/07/2023, 8:28 PM

how would you flatten

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val x = List<Map<Long, Set<Foo>>>

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val y = Map<Long, Set<Foo>>

Nicolas Acart

07/08/2023, 2:29 AM

Are you searching for something like that ?

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val y = x.reduce { mapA, mapB -> mapA.combine(mapB, Set<Foo>::plus) }

To do so, you need to

import arrow.core.combine