sophia/priv/stdlib/ListInternal.aes
2022-06-13 22:33:14 +04:00

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namespace ListInternal =
// -- Flatmap ----------------------------------------------------------------
function flat_map(f : 'a => list('b), lst : list('a)) : list('b) =
switch(lst)
[] => []
x :: xs => f(x) ++ flat_map(f, xs)
// -- From..to ---------------------------------------------------------------
function from_to(a : int, b : int) : list(int) = from_to_(a, b, [])
private function from_to_(a, b, acc) =
if (a > b) acc else from_to_(a, b - 1, b :: acc)