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author | Jed Barber <jjbarber@y7mail.com> | 2015-10-17 14:20:48 +1100 |
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committer | Jed Barber <jjbarber@y7mail.com> | 2015-10-17 14:20:48 +1100 |
commit | 63c3043200de6b28a8c192f1b5625940435ea55e (patch) | |
tree | ab761edbbc71b2b2f28e0ef7e10b8adc58d44320 /sort/mergesort.hs | |
parent | 5933f248c18914fbbce03102b340361a575eae3c (diff) |
Organised source code a bit, added makefile with clean target
Diffstat (limited to 'sort/mergesort.hs')
-rw-r--r-- | sort/mergesort.hs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sort/mergesort.hs b/sort/mergesort.hs new file mode 100644 index 0000000..5c140b3 --- /dev/null +++ b/sort/mergesort.hs @@ -0,0 +1,19 @@ + + + +mergeSort :: Ord a => [a] -> [a] +mergeSort x | length x <= 1 = x +mergeSort x = + let n = (length x) `div` 2 + left = mergeSort (take n x) + right = mergeSort (drop n x) + in merge left right + + + +merge :: Ord a => [a] -> [a] -> [a] +merge [] y = y +merge x [] = x +merge (x:xs) (y:ys) = if x <= y then x:(merge xs (y:ys)) else y:(merge (x:xs) ys) + + |