1 files changed, 26 insertions, 1 deletions

diff --git a/world.lua b/world.lua
index fd793a4..cb322df 100644
--- a/world.lua
+++ b/world.lua
@@ -1,5 +1,30 @@
+_World = {}
 World = {}
+
 function World.add(entity)
-    World[entity.id] = entity
+    _World[entity.id] = entity
     return World
+end
+
+function World.foreach(f)
+    for id, entity in pairs(_World) do
+        f(entity)
+    end
+end
+
+function World.cull_the_dead()
+    to_reap = {}
+    for id, e in pairs(_World) do
+        if (e.life_time ~= nil and e.life_time <= 0) then
+            to_reap[id] = e
+        end
+    end
+    for id, e in pairs(to_reap) do
+        _World[id] = nil
+    end
+    return _World
+end
+
+function World.get(id)
+    return _World[id]
 end
\ No newline at end of file