refactor day 3

3/basic.nix

@@ -5,10 +5,10 @@ let
 
   chopInHalf = s: let
     len = stringLength s;
-  in {
-    a = substring 0 (len / 2) s;
-    b = substring (len / 2) len s;
-  };
+  in [
+    (substring 0 (len / 2) s)
+    (substring (len / 2) len s)
+  ];
 
   lowercasePrio = flip pipe [ strings.charToInt (flip sub 96) ];
 
@@ -21,8 +21,8 @@ pipe input [
   (splitStr "\n")
   (map (flip pipe [
     chopInHalf
-    (mapAttrs (const strings.stringToCharacters))
-    (unpackAttrsCall intersectLists)
+    (map strings.stringToCharacters)
+    (uncurry intersectLists)
     head
     prio
   ]))

lib/default.nix

@@ -19,7 +19,5 @@ let
       elemAt
       (get: f (get 0) (get 1))
     ];
-
-    unpackAttrsCall = f: attrs: f attrs.a attrs.b;
   };
 in nixpkgsLib.fix aocLib