在F＃中以无点样式进行匹配？

Question

考虑以下代码：

type Fruit = Apple | Banana

let totalCost fruits = 
  fruits
  |> Seq.map (fun fruit -> 
    match fruit with
    | Apple -> 0.50
    | Banana -> 0.70
  )
  |> Seq.sum

我totalCost可以用fruit删除标识符的方式重写得更简洁吗？

像这样：

// Not real code
let totalCost fruits = 
  fruits
  |> Seq.map (
    match
    | Apple -> 0.50
    | Banana -> 0.70
  )
  |> Seq.sum

Answer 1

您要寻找的关键字是function：

|> Seq.map ( 
    function
    | Apple -> 0.50 
    | Banana -> 0.70
)

function 屈服于 fun x -> match x with