Q如何最有效地转换Dictionary<string, int> to a Dictionary<int, List<string>>var input = new Dictionary<string, int>() { {"A", 1}, {"B", 1}, {"C", 2} ...Dictionary<int, List
我是Haskell的新手,所以我还在学很多东西。他们给了我一个名字和年龄的列表,我需要用他们的年龄来对他们进行字母排序和递增排序。qsort :: (Ord a) => [a] -> [a]qsort [] = []qsort [x, y] = [(min x y), (max x y)]
-- x is the pivot, left qui