Allow entities to be stored in maps

src/play_clj/entities.clj

@@ -11,11 +11,20 @@
 (defprotocol Entity
   (draw-entity! [this screen batch] "Draws the entity"))
 
+(defn draw-map!
+  [m screen batch]
+  (doseq [[k v] m]
+    (try
+      (draw-entity! v screen batch)
+      (catch Exception _))))
+
 (extend-protocol Entity
   clojure.lang.PersistentArrayMap
-  (draw-entity! [this screen batch])
+  (draw-entity! [this screen batch]
+    (draw-map! this screen batch))
   clojure.lang.PersistentHashMap
-  (draw-entity! [this screen batch])
+  (draw-entity! [this screen batch]
+    (draw-map! this screen batch))
   nil
   (draw-entity! [this screen batch]))