Question

在C＃中，我们可以为属性声明私有的setter。如何使用F＃完成此操作？

具体来说，我如何确保只能在班级内更改属性的状态？

例如，我们如何将FirstName setter属性声明为private，如C＃？

public string FirstName { get; private set; }

type SomeViewModel() =
    inherit ViewModel()
    let mutable firstName = ""
    let mutable lastName = ""

    member this.FirstName
        with get() = firstName 
        and set(value) =
            firstName <- value
            base.notifyPropertyChanged(<@ this.FirstName @>)

    member this.LastName
        with get() = lastName 
        and set(value) =
            lastName <- value
            base.notifyPropertyChanged(<@ this.LastName @>)

    member this.GetFullName() = 
        sprintf "%s %s" (this.FirstName) (this.LastName)

Answer 1

 require(igraph)
 x<-graph.data.frame(df[,c(1,4)])
 #You can also take a look with plot(x)
 res<-clusters(x)
 split(names(res$membership),res$membership)
 #$`1`
 #[1] "f_1"
 #$`2`
 #[1] "f_2"    "f_185"  "f_408"  "f_2334"
 #$`3`
 #[1] "f_3"    "f_7"    "f_414"  "f_2181" "f_2969"
 #$`4`
 #[1] "f_4"    "f_2271"
 #$`5`
 #[1] "f_5"
 #$`6`
 #[1] "f_6"    "f_10"   "f_747"  "f_2068" "f_2929" "f_2970"

这直接显示在MSDN F# documentation。

中

Answer 2

这是UserVoice的建议。

显然，它被认为是F＃3.0版本，然后被剪切。它仍然是“原则上批准的”。

https://fslang.uservoice.com/forums/245727-f-language/suggestions/7640829-allow-access-modifies-to-auto-properties-getters-a

如何使用F＃为属性声明私有setter

2 个答案: