kotlin-stdlib/kotlin.text/associateTo

associateTo

inline fun <K, V, M : MutableMap<in K, in V>> CharSequence.associateTo(destination: M, transform: (Char) -> Pair<K, V>): M(source)

Populates and returns the destination mutable map with key-value pairs provided by transform function applied to each character of the given char sequence.

If any of two pairs would have the same key the last one gets added to the map.

Since Kotlin

1.0

Samples

import java.util.Locale
import kotlin.test.*

fun main() { 
   //sampleStart 
   val string = "bonne journée"
// associate each character with its code
val result = mutableMapOf<Char, Int>()
string.associateTo(result) { char -> char to char.code }
// notice each letter occurs only once
println(result) // {b=98, o=111, n=110, e=101,  =32, j=106, u=117, r=114, é=233} 
   //sampleEnd
}