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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
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Task/Search-a-list/Haskell/search-a-list-1.hs Normal file
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import Data.List
haystack=["Zig","Zag","Wally","Ronald","Bush","Krusty","Charlie","Bush","Bozo"]
needles = ["Washington","Bush"]

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Task/Search-a-list/Haskell/search-a-list-2.hs Normal file
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*Main> map (\x -> (x,elemIndex x haystack)) needles
[("Washington",Nothing),("Bush",Just 4)]

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Task/Search-a-list/Haskell/search-a-list-3.hs Normal file
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*Main> map (\x -> (x,elemIndices x haystack)) needles
[("Washington",[]),("Bush",[4,7])]

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Task/Search-a-list/Haskell/search-a-list-4.hs Normal file
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import Control.Monad
import Control.Arrow
*Main> map (ap (,) (flip elemIndex haystack)) needles
[("Washington",Nothing),("Bush",Just 4)]