lib.misc.uniqList

The following is the current implementation of this function.

uniqList = { inputList, acc ? [] }:
    let go = xs: acc:
             if xs == []
             then []
             else let x = head xs;
                      y = if elem x acc then [] else [x];
                  in y ++ go (tail xs) (y ++ acc);
    in go inputList acc;