mapOf

fun <K, V> mapOf(vararg pairs: Pair<K, V>): Map<K, V>

Returns a new read-only map with the specified contents, given as a list of pairs where the first value is the key and the second is the value.

If multiple pairs have the same key, the resulting map will contain the value from the last of those pairs.

Entries of the map are iterated in the order they were specified.

The returned map is serializable (JVM).

Samples

import samples.*
import kotlin.test.*
import java.util.*
fun main() { 
   //sampleStart 
   val map = mapOf(1 to "x", 2 to "y", -1 to "zz")
assertPrints(map, "{1=x, 2=y, -1=zz}") 
   //sampleEnd
}

inline fun <K, V> mapOf(): Map<K, V>

Returns an empty read-only map.

The returned map is serializable (JVM).

Samples

import samples.*
import kotlin.test.*
import java.util.*
fun main() { 
   //sampleStart 
   val map = emptyMap<String, Int>()
assertTrue(map.isEmpty())

val anotherMap = mapOf<String, Int>()
assertTrue(map == anotherMap, "Empty maps are equal") 
   //sampleEnd
}