diff options
| 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 /fp1/week3/mart/StdStack.icl | |
| parent | week6 camil: working positioning of lines by putting empties at left and righ... (diff) | |
Diffstat (limited to 'fp1/week3/mart/StdStack.icl')
| -rw-r--r-- | fp1/week3/mart/StdStack.icl | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/fp1/week3/mart/StdStack.icl b/fp1/week3/mart/StdStack.icl deleted file mode 100644 index 13220e1..0000000 --- a/fp1/week3/mart/StdStack.icl +++ /dev/null @@ -1,57 +0,0 @@ -implementation module StdStack
-
-import StdEnv
-
-:: Stack a = Stack [a]
-
-newStack :: Stack a
-newStack = Stack []
-
-push :: a (Stack a) -> Stack a
-push x (Stack xs) = Stack [x:xs]
-
-pushes :: [a] (Stack a) -> Stack a
-pushes [] (Stack s) = Stack s
-pushes [x:xs] (Stack s) = pushes xs (push x (Stack s))
-
-pop :: (Stack a) -> Stack a
-pop (Stack []) = abort "Can't pop from empty stack..."
-pop (Stack [x:xs]) = Stack xs
-
-popn :: Int (Stack a) -> Stack a
-popn 0 s = s
-popn n s = popn (n-1) (pop s)
-
-top :: (Stack a) -> a
-top (Stack []) = abort "Can't give top of empty stack..."
-top (Stack [x:_]) = x
-
-topn :: Int (Stack a) -> [a]
-topn 0 _ = []
-topn n x = [top x:topn (n-1) (pop x)]
-
-elements :: (Stack a) -> [a]
-elements (Stack s) = s
-
-count :: (Stack a) -> Int
-count (Stack []) = 0
-count (Stack [_:xs]) = 1 + count (Stack xs)
-
-Start = ( "s0 = newStack = ", s0,'\n'
- , "s1 = push 1 s0 = ", s1,'\n'
- , "s2 = pushes [2..5] s1 = ",s2,'\n'
- , "s3 = pop s2 = ", s3,'\n'
- , "s4 = popn 3 s3 = ", s4,'\n'
- , "s5 = top s4 = ", s5,'\n'
- , "s6 = topn 3 s2 = ", s6,'\n'
- , "s7 = elements s2 = ", s7,'\n'
- )
-where
- s0 = newStack
- s1 = push 1 s0
- s2 = pushes [2..5] s1
- s3 = pop s2
- s4 = popn 3 s3
- s5 = top s4
- s6 = topn 3 s2
- s7 = elements s2
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