use maybe

sanctuary-js · Mar 26, 2019 · 6006db3 · 6006db3
1 parent 32e3d4d
commit 6006db3
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/index.js b/index.js
@@ -3138,10 +3138,9 @@
   //. Nothing
   //. ```
   function tail(foldable) {
+    var empty = Z.empty (foldable.constructor);
     return Z.reduce (function(m, x) {
-      return m.isNothing ?
-             Just (Z.empty (foldable.constructor)) :
-             Z.map (append (x), m);
+      return Just (maybe (empty) (append (x), m) (m));
     }, Nothing, foldable);
   }
   _.tail = {