F# - 可变字典(Mutable Dictionary)

Dictionary <'TKey，'TValue>类是F# 字典数据结构的可变模拟，并且包含许多相同的功能。

创建可变字典

使用 new 关键字并调用列表的构造函数来创建可变字典，以下示例演示了这一点-

open System.Collections.Generic
let dict = new Dictionary<string, string>()
dict.Add("1501", "Zara Ali")
dict.Add("1502","Rishita Gupta")
dict.Add("1503","Robin Sahoo")
dict.Add("1504","Gillian Megan")
printfn "Dictionary - students: %A" dict

编译并执行程序时，将产生以下输出-

Dictionary - students: seq
[[1501, Zara Ali]; [1502, Rishita Gupta]; [1503, Robin Sahoo];
[1504, Gillian Megan]]

字典类

Dictionary(TKey，TValue)类表示键和值的集合。

无涯教程网

链接：https://www.learnfk.comhttps://www.learnfk.com/fsharp/fsharp-mutable-dictionary.html

来源：LearnFk无涯教程网

构造函数

字典方法

open System.Collections.Generic
let dict = new Dictionary<string, string>()

dict.Add("1501", "Zara Ali")
dict.Add("1502","Rishita Gupta")
dict.Add("1503","Robin Sahoo")
dict.Add("1504","Gillian Megan")

printfn "Dictionary - students: %A" dict
printfn "Total Number of Students: %d" dict.Count
printfn "The keys: %A" dict.Keys
printf"The Values: %A" dict.Values

编译并执行程序时，将产生以下输出-

Dictionary - students: seq
[[1501, Zara Ali]; [1502, Rishita Gupta]; [1503, Robin Sahoo];
[1504, Gillian Megan]]
Total Number of Students: 4
The keys: seq ["1501"; "1502"; "1503"; "1504"]
The Values: seq ["Zara Ali"; "Rishita Gupta"; "Robin Sahoo"; "Gillian Megan"]