Hi! I have a list of objects, lets say a list of P...

# getting-started

[Kenneth]

Hi! I have a list of objects, lets say a list of Person. I want to remove all duplicates from that list based on the combination of person.name and person.age. What is the "kotlin" way to do so?

[diesieben07]

list.distinctBy { it.name to it.age }

[diesieben07]

If you have more than one value to compare:
list.distinctBy { listOf(it.name, it.firstName, it.age) }

[Kenneth]

Thanks!

[Kenneth]

Shouldn't it find the same amount of duplicates as .groupingBy { it.name to it.age }.eachCount().filterValues { it > 1 } ?

[diesieben07]

Well, it doesn't really count duplicates. It filters them out

[diesieben07]

But that should do something similar

[Kenneth]

That's true, then it works 🙂

[Dico]

You can also use Triple if you have 3 properties to compare

[Kenneth]

Sweet, thanks!