Hello everyone, I was trying to group list of events by day and sort the events within that day and ...

# compose

[Nebil]

Hello everyone, I was trying to group list of events by day and sort the events within that day and I ran into a problem when I try to group the events for a given day by event type and still sort the whole events for that given day by start time regardless of the event type. Open to any suggestions. Thanks.

[Landry Norris]

eventsWithType.groupBy { it.day }.mapValues { it.value.sortedBy { event -> event.startTime } }

will group by day and sort each day’s events by startTime. To group by event type as well, wrap this with

events.groupBy { it.eventType }.mapValues { groupUsingAboveCode(it.value) }

[Nebil]

I'll give it a go. Thanks

[Landry Norris]

I would personally create some data classes so you don’t have a bunch of maps. I see this is in the compose channel, so I’ll add that this shouldn’t be done inside a composable. The sorting should happen in your state holder (if you get events from a DB, you can set up a flow to handle the above transformation and use collectAsState in your compose code.

[Nebil]

I do have data classes and the mapper is working fine the problem is when I sort the events one group always comes on top.

Examples

I have
9am type a
10am type b
11am type a
This should display as it is but it always displays group 'type b'up top.