fun <T : Any> nullsFirst(
    comparator: Comparator<in T>
): Comparator<T?>

Platform and version requirements: JVM

fun <T : Any> nullsFirst(
    comparator: Comparator<in T>
): Comparator<T?>

Platform and version requirements: JS

Extends the given comparator of non-nullable values to a comparator of nullable values considering null value less than any other value.

inline fun <T : Comparable<T>> nullsFirst(): Comparator<T?>

Provides a comparator of nullable Comparable values considering null value less than any other value.