Kotlin list map to another list

Create a map from list kotlin

fun main() {
    val numbers = listOf("one", "two", "three", "four")

    println(numbers.associateBy { it.first().toUpperCase() })
    println(numbers.associateBy(keySelector = { it.first().toUpperCase() }, valueTransform = { it.length }))
}

Kotlin list map to another list

12,12,344,5

Similar codes

21 votes352 views1 answer
Why was kotlin created
Kotlin
2 votes264 views1 answer
Kotlin read all inputstream
Kotlin
3 votes259 views2 answers
Kotlin power
Kotlin
0 vote248 views1 answer
Socket.io kotlin
Kotlin
-4 votes255 views5 answers
Kotlin delay
Kotlin
11 votes318 views6 answers
Toast in kotlin
Kotlin
4 votes276 views1 answer
Kotlin online compiler
Kotlin
2 votes269 views3 answers
Could not parse the Android Application Module's Gradle config. Resolve gradle build issues and/or resync
Kotlin
1 vote271 views1 answer
How to reverse array in kotlin
Kotlin
6 votes284 views1 answer
What is the difference var and val in kotlin
Kotlin