quick one Please who knows an idiomatic way to select a prev kotlinlang #getting-started

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Smorg

12/24/2018, 10:15 PM

quick one: Please, who knows an idiomatic way to select a previous or next element in a collection in Kotlin?

val list = listOf(...)
val current = ...
val next = list[list.indexOf(current) + 1]
val previous = list[list.indexOf(current) - 1]

karelpeeters

12/24/2018, 10:18 PM

I don't think you can do a lot better than that.

🙏 1

Shawn

12/25/2018, 1:07 AM

sounds like you want a doubly linked list

Pavlo Liapota

12/25/2018, 9:41 AM

Look at methods that

ListIterator

has https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-list/list-iterator.html

But this would help only if iterate to your

current

element through this iterator, and not just getting

current

element from outside.

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