/Kotlin/How to get index of item in arraylist in kotlin

How to get index of item in arraylist in kotlin

val b: List<Int> = a.mapIndexed { i, b -> if (b) i else null }.filterNotNull().toList()
val c: List<Int> = a.withIndex().filter { it.value }.map { it.index }

Similar codes

1 vote247 views1 answer
Kotlin when greater than
Kotlin
2 votes235 views2 answers
Make function kotlin
Kotlin
0 vote238 views1 answer
Kotlin filterindexed
Kotlin
0 vote238 views1 answer
How to set all window background color in kotlin xml
Kotlin
3 votes232 views1 answer
Make list kotlin
Kotlin
0 vote242 views1 answer
Kotlin coroutine invoke completion
Kotlin
0 vote241 views1 answer
Kotlin inline function return
Kotlin
5 votes223 views1 answer
Arraylist kotlin
Kotlin
0 vote253 views1 answer
Android start new Activity from an activity with a child
Kotlin
6 votes237 views2 answers
Kotlin thread
Kotlin