linasm · March 15, 2021 06:17 · Jan 7, 2019 · May 4, 2018
diff --git a/unapply.scala b/unapply.scala
@@ -6,7 +6,7 @@ object FullName {
   def apply(first: String, last: String): FullName =
     new FullName(first, last)
 
-  def unapply(full: FullName): Option[(String, String)] =
+  def unapply(full: FullName): Some[(String, String)] =
     Some((full.first, full.last))
 }
 
@@ -15,24 +15,24 @@ val me = FullName("Linas", "Medžiūnas")
 val FullName(meFirst, meLast) = me
 
 object DateTime {
-  def unapply(dt: LocalDateTime): Option[(LocalDate, LocalTime)] =
+  def unapply(dt: LocalDateTime): Some[(LocalDate, LocalTime)] =
     Some((dt.toLocalDate, dt.toLocalTime))
 }
 
 object DateTimeSeq {
-  def unapplySeq(dt: LocalDateTime): Option[Seq[Int]] =
+  def unapplySeq(dt: LocalDateTime): Some[Seq[Int]] =
     Some(Seq(
       dt.getYear, dt.getMonthValue, dt.getDayOfMonth,
       dt.getHour, dt.getMinute, dt.getSecond))
 }
 
 object Date {
-  def unapply(d: LocalDate): Option[(Int, Int, Int)] =
+  def unapply(d: LocalDate): Some[(Int, Int, Int)] =
     Some((d.getYear, d.getMonthValue, d.getDayOfMonth))
 }
 
 object Time {
-  def unapply(t: LocalTime): Option[(Int, Int, Int)] =
+  def unapply(t: LocalTime): Some[(Int, Int, Int)] =
     Some((t.getHour, t.getMinute, t.getSecond))
 }
 

diff --git a/unapply.scala b/unapply.scala
@@ -0,0 +1,65 @@
+import java.time.{LocalDate, LocalDateTime, LocalTime}
+
+/*case */class FullName(val first: String, val last: String)
+
+object FullName {
+  def apply(first: String, last: String): FullName =
+    new FullName(first, last)
+
+  def unapply(full: FullName): Option[(String, String)] =
+    Some((full.first, full.last))
+}
+
+val me = FullName("Linas", "Medžiūnas")
+
+val FullName(meFirst, meLast) = me
+
+object DateTime {
+  def unapply(dt: LocalDateTime): Option[(LocalDate, LocalTime)] =
+    Some((dt.toLocalDate, dt.toLocalTime))
+}
+
+object DateTimeSeq {
+  def unapplySeq(dt: LocalDateTime): Option[Seq[Int]] =
+    Some(Seq(
+      dt.getYear, dt.getMonthValue, dt.getDayOfMonth,
+      dt.getHour, dt.getMinute, dt.getSecond))
+}
+
+object Date {
+  def unapply(d: LocalDate): Option[(Int, Int, Int)] =
+    Some((d.getYear, d.getMonthValue, d.getDayOfMonth))
+}
+
+object Time {
+  def unapply(t: LocalTime): Option[(Int, Int, Int)] =
+    Some((t.getHour, t.getMinute, t.getSecond))
+}
+
+object AM {
+  def unapply(t: LocalTime): Option[(Int, Int, Int)] =
+    t match {
+      case Time(h, m, s) if h < 12 => Some((h, m, s))
+      case _ => None
+    }
+}
+
+object PM {
+  def unapply(t: LocalTime): Option[(Int, Int, Int)] =
+    t match {
+      case Time(12, m, s) => Some(12, m, s)
+      case Time(h, m, s) if h > 12 => Some(h - 12, m, s)
+      case _ => None
+    }
+}
+
+val now = LocalDateTime.now
+
+val dt @ DateTime(date @ Date(y, m, d), time @ Time(h, mm, s)) = now
+
+val DateTimeSeq(y2, m2, d2, h2, _*) = now
+
+Seq(LocalTime.now) map {
+  case t @ AM(h, m, _) => f"$h%2d:$m%02d AM ($t precisely)"
+  case t @ PM(h, m, _) => f"$h%2d:$m%02d PM ($t precisely)"
+}