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| author | Camil Staps | 2016-02-02 19:24:50 +0100 |
|---|---|---|
| committer | Camil Staps | 2016-02-02 19:24:50 +0100 |
| commit | a7d7542dc646a5fd124ef71e71ce260889f1701b (patch) | |
| tree | 04ed89503bbb3cc9933273a1326a53ca724c3492 /1415/files/practicum/Map.icl | |
| parent | week6 camil: working positioning of lines by putting empties at left and righ... (diff) | |
Diffstat (limited to '1415/files/practicum/Map.icl')
| -rw-r--r-- | 1415/files/practicum/Map.icl | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/1415/files/practicum/Map.icl b/1415/files/practicum/Map.icl new file mode 100644 index 0000000..deccc07 --- /dev/null +++ b/1415/files/practicum/Map.icl @@ -0,0 +1,21 @@ +implementation module Map
+
+import BinTree // voor het type Tree en voorbeelden t0 t/m t7
+import Maybe // voor het type Maybe
+import StdList // voor de standaard map functie
+
+class Map c :: ... // maak deze type constructor class af
+
+instance Map [] where ... // maak deze instance af
+instance Map Maybe where ... // maak deze instance af
+instance Map Tree where ... // maak deze instance af
+
+// voorgegeven functie, specifiek voor Maybe:
+mapMaybe :: (a -> b) (Maybe a) -> Maybe b
+mapMaybe f Nothing = Nothing
+mapMaybe f (Just x) = Just (f x)
+
+// voorgegeven functie, specifiek voor Tree:
+mapTree :: (a -> b) (Tree a) -> Tree b
+mapTree f Leaf = Leaf
+mapTree f (Node x l r) = Node (f x) (mapTree f l) (mapTree f r)
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