8 lines
224 B
OCaml
8 lines
224 B
OCaml
let unique lst =
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let f lst x = if List.mem x lst then lst else x::lst in
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List.rev (List.fold_left f [] lst)
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let ( -| ) a b =
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unique (List.filter (fun v -> not (List.mem v b)) a)
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let ( -|- ) a b = (b -| a) @ (a -| b)
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