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|
module Utils.List
( repeat
, splitAt
, maybeHead
, maybeTail
) where
import List
repeat : Int -> a -> List a
repeat count elem =
if count > 0
then
elem :: (repeat (count - 1) elem)
else
[]
splitAt : Int -> List a -> (List a, List a)
splitAt n xs = (List.take n xs, List.drop n xs)
maybeHead : List a -> Maybe a
maybeHead xs =
case xs of
x :: _ -> Just x
_ -> Nothing
maybeTail : List a -> Maybe (List a)
maybeTail xs =
case xs of
_ :: tl -> Just tl
_ -> Nothing
|
