Kotlin HashMap mapNotNull()
Syntax & Examples

Syntax of HashMap.mapNotNull()

The syntax of HashMap.mapNotNull() extension function is:

fun <K, V, R : Any> Map<out K, V>.mapNotNull( transform: (Entry<K, V>) -> R? ): List<R>

This mapNotNull() extension function of HashMap returns a list containing only the non-null results of applying the given transform function to each entry in the original map.