From e1b62145b10767018f8e80f0b3f5e152d39db2ca Mon Sep 17 00:00:00 2001
From: Enrico Lumetti <enrico.lumetti@gmail.com>
Date: Sun, 5 Sep 2021 01:14:17 +0200
Subject: [PATCH] Add snippet for map key querying

---
 map_container.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/map_container.m b/map_container.m
index eac8543..cdfaa78 100644
--- a/map_container.m
+++ b/map_container.m
@@ -42,4 +42,8 @@ assert(isequal( values(pairs), {"Hello", "Enrico"} ));
 assert(isequal( pairs('Msg'), "Hello" ));
 
 % change a value
-pairs('Msg') = "World";
\ No newline at end of file
+pairs('Msg') = "World";
+
+% check for key existence
+assert(isequal(pairs.isKey('Msg'), true));
+assert(isequal(pairs.isKey('Test'), false));