Difference between revisions of "User:Marcelo.parrela"
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(Quicksort - An other Implementation) |
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-- by Marcelo Parrela (marcelo.parrela@gmail.com) |
-- by Marcelo Parrela (marcelo.parrela@gmail.com) |
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quicksort' [] = [] |
quicksort' [] = [] |
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where |
where |
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(l1,l2) = separate as a [] [] |
(l1,l2) = separate as a [] [] |
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| − | <i style="color: blue;">-- lê a lista e a separa em duas: l1 para os elementos</i> |
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| − | <i style="color: blue;">-- menores ou iguais ao pivot e l2 para os demais</i> |
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separate [] _ a b = (a,b) |
separate [] _ a b = (a,b) |
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separate (l:ls) a l1 l2 |
separate (l:ls) a l1 l2 |
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Revision as of 12:15, 14 October 2013
-- by Marcelo Parrela (marcelo.parrela@gmail.com)
quicksort' [] = []
quicksort' (a:as) = quicksort' l1 ++ a : quicksort' l2
where
(l1,l2) = separate as a [] []
separate [] _ a b = (a,b)
separate (l:ls) a l1 l2
| l <= a = separate ls a l1' l2
| otherwise = separate ls a l1 l2'
where
l1' = l1++[l]
l2' = l2++[l]