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• kotlin.collections.Map.kt

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name.remal.kotlin.collections.Map.kt Maven / Gradle / Ivy

package name.remal

import java.util.Collections.synchronizedMap
import java.util.stream.Stream

fun > M?.nullIfEmpty(): M? = nullIf(Map<*, *>::isEmpty)

fun  Map.asSynchronized(): Map = synchronizedMap(this)

inline fun  Map.forEachIndexed(action: (index: Int, key: K, value: V) -> Unit) {
    this.entries.forEachIndexed { index, entry ->
        action(index, entry.key, entry.value)
    }
}

fun  Map.filterNotNullKeys(): Map = filterKeys { it != null }.uncheckedCast()
fun  Map.filterNotNullValues(): Map = filterValues { it != null }.uncheckedCast()

fun  Map.stream(): Stream> = entries.stream()