kotlincollectionsinitializationmutablemap

How to create a MutableMap with all keys initially set to same value in Kotlin?

I want to create a mutable map whose keys fall in a continuous range, and values initially set to the same value 9 in a single line using Kotlin. How to do that?

Solution

  • You can use the following way:

    import java.util.*

fun main(args: Array<String>) {

    val a :Int = 0
    val b :Int = 7
    val myMap = mutableMapOf<IntRange, Int>()
    myMap[a..b] = 9
    myMap.toMap()
    println(myMap) //Output: {0..7=9}

}