[project @ 2001-12-21 15:07:20 by simonmar]

[ghc-base.git] / Data / List.hs

diff --git a/Data/List.hs b/Data/List.hs
index ce4c9b3..9082db5 100644 (file)
--- a/Data/List.hs
+++ b/Data/List.hs
@@ -9,7 +9,7 @@
 -- Stability   :  provisional
 -- Portability :  portable
 --
--- $Id: List.hs,v 1.1 2001/06/28 14:15:02 simonmar Exp $
+-- $Id: List.hs,v 1.2 2001/12/21 15:07:21 simonmar Exp $
 --
 -- Operations on lists.
 --
@@ -317,13 +317,21 @@ insertBy cmp x ys@(y:ys')
      GT -> y : insertBy cmp x ys'
      _  -> x : ys
 
-maximumBy              :: (a -> a -> a) -> [a] -> a
-maximumBy _   []       =  error "List.maximumBy: empty list"
-maximumBy max xs       =  foldl1 max xs
-
-minimumBy              :: (a -> a -> a) -> [a] -> a
-minimumBy _   []       =  error "List.minimumBy: empty list"
-minimumBy min xs       =  foldl1 min xs
+maximumBy              :: (a -> a -> Ordering) -> [a] -> a
+maximumBy _ []         =  error "List.maximumBy: empty list"
+maximumBy cmp xs       =  foldl1 max xs
+                       where
+                          max x y = case cmp x y of
+                                       GT -> x
+                                       _  -> y
+
+minimumBy              :: (a -> a -> Ordering) -> [a] -> a
+minimumBy _ []         =  error "List.minimumBy: empty list"
+minimumBy cmp xs       =  foldl1 min xs
+                       where
+                          min x y = case cmp x y of
+                                       GT -> y
+                                       _  -> x
 
 genericLength           :: (Num i) => [b] -> i
 genericLength []        =  0