From f610e5e5572c23e7271c439b5f350ce341545095 Mon Sep 17 00:00:00 2001
From: norangebit <git@norangeb.it>
Date: Thu, 11 Apr 2019 21:57:46 +0200
Subject: [PATCH] update ordered dictionaries

if the dictionary is empty the functions min, max, floor and celling
return None.
---
 .../algorithms/datastructures/dictionary/Dictionaries.kt  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main/kotlin/it/norangeb/algorithms/datastructures/dictionary/Dictionaries.kt b/src/main/kotlin/it/norangeb/algorithms/datastructures/dictionary/Dictionaries.kt
index bc2bd0f..e36e98a 100644
--- a/src/main/kotlin/it/norangeb/algorithms/datastructures/dictionary/Dictionaries.kt
+++ b/src/main/kotlin/it/norangeb/algorithms/datastructures/dictionary/Dictionaries.kt
@@ -37,8 +37,8 @@ interface Dictionary<K, V> {
 }
 
 interface OrderedDictionary<K : Comparable<K>, V> : Dictionary<K, V> {
-    fun max(): K
-    fun min(): K
-    fun floor(key: K): K
-    fun ceiling(key: K): K
+    fun max(): Option<K>
+    fun min(): Option<K>
+    fun floor(key: K): Option<K>
+    fun ceiling(key: K): Option<K>
 }