From cff314486cec8857de6f79567852cdc73b41d622 Mon Sep 17 00:00:00 2001
From: Mike Gerber <mike@sprachgewalt.de>
Date: Tue, 29 Nov 2016 18:12:53 +0100
Subject: [PATCH] Add ordering ex

---
 ordering.sc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 ordering.sc

diff --git a/ordering.sc b/ordering.sc
new file mode 100644
index 0000000..2152bce
--- /dev/null
+++ b/ordering.sc
@@ -0,0 +1,22 @@
+import scala.math.Ordering.IntOrdering
+
+
+// Define instantiable integer orderings
+class RealIntOrdering extends IntOrdering {}
+
+class ReverseIntOrdering extends Ordering[Int] {
+  val realIntOrdering = new RealIntOrdering()
+  def compare(x: Int, y: Int): Int = -realIntOrdering.compare(x, y)
+}
+
+
+// Test stuff
+val values = List(1,2,6,3,4)
+
+val ord: Ordering[Int] = new RealIntOrdering()
+values.min(cmp = ord)
+values.sorted(ord = ord)
+
+val reverseOrd = new ReverseIntOrdering()
+values.min(cmp = reverseOrd)
+values.sorted(ord = reverseOrd)