avdi · December 20, 2015 08:19 · Jul 28, 2013 · Jul 28, 2013
diff --git a/def.exs b/def.exs
@@ -9,7 +9,16 @@ def next_state
   (".", live_count) when live_count === 3 -> "o" 
   (".", _) -> "."
   (_, x, y) when (x < 0 or y < 0) ->  "."
+
+def just_one_arity(x,y) -> IO.puts "hello"
 
 
 # This would internally define both next_state/3 and next_state/2
-# Since these are distinctions that the user largely doesn't care about
+# Since these are distinctions that the user largely doesn't care about
+
+# Thoughts on referencing functions:
+# The syntax here is intentionally an ugly placeholder because it's not important
+# This is more about the semantics
+$next_state$ # returns an anonymous lambda which dyn-dispatches to all arities, because DWIM
+$next_state/2$ # returns a reference to the specific arity definition of next_state
+$just_one_arity$ # returns just_one_arity/1 since it's unambiguous
diff --git a/def.exs b/def.exs
@@ -0,0 +1,15 @@
+def next_state
+  (board, x, y) ->
+    cell = cell_at(board, x, y)
+    live_count = live_neighbors(board, x, y)
+    next_state(cell, live_count)
+  end
+  ("o", live_count) when live_count in 2..3 -> "o"
+  ("o", _) -> "."
+  (".", live_count) when live_count === 3 -> "o" 
+  (".", _) -> "."
+  (_, x, y) when (x < 0 or y < 0) ->  "."
+
+
+# This would internally define both next_state/3 and next_state/2
+# Since these are distinctions that the user largely doesn't care about