Add size function for maps

1 files changed, 20 insertions, 1 deletions

diff --git a/collections/map/map.adoc b/collections/map/map.adoc
index fc6b8b7..837a08a 100644
--- a/collections/map/map.adoc
+++ b/collections/map/map.adoc
@@ -1,7 +1,7 @@
 Map
 ===
 Tucker Evans
-v0.1, 2020-07-06
+v0.2, 2020-07-06
 
 A basic map implemented in an AVL tree.
 
@@ -50,3 +50,22 @@ Examples
 
 map *dict = map_new((cmp_func) strcmp);
 ----
+
+[[map_size]]
++map_size(map *self)+
+~~~~~~~~~~~~~~~~~~~~~
+Returns the number of key, value pairs stored in map +self+.
+
+Examples
+^^^^^^^^
+[source,c]
+----
+#include "map.h"
+#include <string.h>
+
+map *dict = map_new((cmp_func) strcmp);
+
+assert(map_size(dict) == 0);
+map_set(dict, "ONE", NULL);
+assert(map_size(dict) == 1);
+----