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99 Elm Problems/Problem 7/Solutions

< 99 Elm Problems‎ | Problem 7
(Redirected from 99 Elm Problems/Lists/Problem 7: Flatten a nested list structure/Solutions)

Solution 1: Recursive version 

flatten list =
    case list of
        Elem e -> [ e ]
        NestedList [] -> []
        NestedList (head :: tail) -> flatten head ++ flatten (NestedList tail)
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