izumi.fundamentals.collections.impl.IzTraversables.scala Maven / Gradle / Ivy
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package izumi.fundamentals.collections.impl
import izumi.functional.Lub
import scala.collection.compat.*
final class IzTraversables[A](private val list: IterableOnce[A]) extends AnyVal {
def maxOr(default: A)(implicit cmp: Ordering[A]): A = {
val iterator = list.iterator
if (iterator.nonEmpty) {
iterator.max(cmp)
} else {
default
}
}
def minOr(default: A)(implicit cmp: Ordering[A]): A = {
val iterator = list.iterator
if (iterator.nonEmpty) {
iterator.min(cmp)
} else {
default
}
}
def ifEmptyOr[E, N, L](a: => E)(l: IterableOnce[A] => N)(implicit ev: Lub[E, N, L]): L = {
if (list.iterator.isEmpty) {
ev.fst(a)
} else {
ev.snd(l(list))
}
}
def ifNonEmptyOr[E, N, L](l: IterableOnce[A] => N)(a: => E)(implicit ev: Lub[E, N, L]): L = {
if (list.iterator.isEmpty) {
ev.fst(a)
} else {
ev.snd(l(list))
}
}
}