diff --git a/sonic-radiance.love/core/utils/table.lua b/sonic-radiance.love/core/utils/table.lua
index 46cd624..90064a6 100644
--- a/sonic-radiance.love/core/utils/table.lua
+++ b/sonic-radiance.love/core/utils/table.lua
@@ -24,6 +24,15 @@
 
 local Table = {}
 
+function Table.contain(table, content)
+  for k, v in ipairs(table) do
+    if (v == content) then
+      return true
+    end
+  end
+  return false
+end
+
 function Table.reduce(list, fn)
   local acc
   for k, v in ipairs(list) do