1 files changed, 15 insertions, 0 deletions
diff --git a/stateful.hs b/stateful.hs
new file mode 100644
index 0000000..63548d3
--- /dev/null
+++ b/stateful.hs
@@ -0,0 +1,15 @@
+import Control.Monad.State
+
+type Stack = [Int]
+
+pop :: State Stack Int
+pop = state $ \(x:xs) -> (x,xs)
+
+push :: Int -> State Stack ()
+push a = state $ \xs -> ((), a:xs)
+
+stackManip :: State Stack Int
+stackManip = do
+    push 3
+    pop
+    pop