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kotlinlang

Hi all, how fun is kotlin functional?
given a list of items how can you return a list grouped by consecutive items?
*[“Apple, Bananas, Bananas, Orange” ] should return  [(apple, 1), (bananas, 2), (orange, 1) ]*
I know you could use group by , but it does not respect the order

there is currently no stdlib function for grouping consecutive items
<https://kotlinlang.slack.com/archives/C0922A726/p1629199729456400>

there is an issue discussing one: <https://youtrack.jetbrains.com/issue/KT-8280>
as well as some possible implementation in the thread I linked

thanks i think its best to have it in the stdlib :slightly_smiling_face:

what do you need such a function for, anyways?

I've seen a lot of people request it, but I still haven't figured out why...

business logic aside, consecutive counts can be used to record a "change" in values. Perhaps for a game or checking the value of an electric signal.

How about converting the list to a map following the order

<@U01FA7E9T4N> let say you have a list of items sorted by date like a call history, the logic would be to group consecutive calls and display their counter