kotlin-stdlib/kotlin.collections/MutableMap/put

put

abstract fun put(key: K, value: V): V?(source)

Associates the specified value with the specified key in the map.

Since Kotlin

1.0

Return

the previous value associated with the key, or null if the key was not present in the map.

abstract fun put(key: K, value: V): V?(source)

Associates the specified value with the specified key in the map.

Since Kotlin

1.3

Return

the previous value associated with the key, or null if the key was not present in the map.