更新时间:2023-09-06 21:22:28
一种解决方案:
let tuples = [("A",12); ("A",10); ("B",1); ("C",2); ("C",1)]
tuples
|> Seq.groupBy fst
|> Seq.map (fun (key, values) -> (key, values |> Seq.sumBy snd))
...或不使用管道:
...or without piping:
let tuples = [("A",12); ("A",10); ("B",1); ("C",2); ("C",1)]
Seq.map (fun (key, group) -> key, Seq.sumBy snd group)
(Seq.groupBy fst tuples)