需要創(chuàng)建一個字典，其中鍵是list（Of String）或字符串?dāng)?shù)組我發(fā)現(xiàn)這個鏈接C#列表作為字典鍵但我需要幫助來了解如何使用list（的字符串）來做到這一點Class test Sub TryTest() myDict.Add(New List(Of String) From {"Huey", "Dewey"}, actions.Sleeping) myDict.Add(New List(Of String) From {"Dewey", "Louie"}, actions.Playing) Dim newList As New List(Of String) From {"Dewey", "Louie"} If myDict.ContainsKey(newList) Then MsgBox("myDict contains the list of String, as Key Value") Else MsgBox("myDict don't contains the list of String, as Key Value") End If End Sub Dim myDict As New Dictionary(Of List(Of String), actions)End ClassEnum actions Sleeping Eating Studying PlayingEnd Enum我期望包含鍵的字典輸出。P.S. 由于 c# 接近 vb.net，并且網(wǎng)絡(luò)上有很多 c#/vb.net 翻譯人員可以輕松翻譯，拜托，也非常感謝 c# 的幫助。
2 回答
互換的青春
TA貢獻(xiàn)1797條經(jīng)驗 獲得超6個贊
跟
using System.Collections;
using System.Collections.Generic;
你可以創(chuàng)建一個類，如
sealed class ListComparer : EqualityComparer<List<string>>
{
public override bool Equals(List<string> x, List<string> y)
=> StructuralComparisons.StructuralEqualityComparer.Equals(x, y);
public override int GetHashCode(List<string> x)
=> StructuralComparisons.StructuralEqualityComparer.GetHashCode(x);
}
然后將其用作Dictionary<,>
myDict = new Dictionary<List<string>, Actions>(new ListComparer());
該類也可以是泛型的。ListComparersealed class ListComparer<T> : EqualityComparer<List<T>>
編輯：
在評論之后，我意識到這不起作用（我曾經(jīng)想過）！它適用于和諸如.所以上面的類需要改成：StructuralEqualityComparerList<string>string[]Tuple<string, string, ...>
sealed class ListComparer : EqualityComparer<List<string>>
{
public override bool Equals(List<string> x, List<string> y)
=> StructuralComparisons.StructuralEqualityComparer.Equals(x?.ToArray(), y?.ToArray());
public override int GetHashCode(List<string> x)
=> StructuralComparisons.StructuralEqualityComparer.GetHashCode(x?.ToArray());
}
我最初的嘗試是錯誤的！
精慕HU
TA貢獻(xiàn)1845條經(jīng)驗 獲得超8個贊
問題是你比較2個對象。您需要比較其中的值。我不知道我的代碼 vb.net 是c#（LINQ）。像這樣做。
var myDic = new Dictionary<List<string>, Actions>();
myDic.Add(new List<string>() { "Huey", "Dewey" }, Actions.Sleeping);
myDic.Add(new List<string>() { "Dewey", "Louie" }, Actions.Playing);
var newList = new List<string>() { "Dewey", "Louie" };
if (myDic.Keys.Any(key =>
{
if (key.Count != newList.Count) return false;
var same = true;
for (int i = 0; i < newList.Count; i++)
{
if (key[i] != newList[i]) same = false;
}
return same;
}))
MsgBox("myDict contains the list of String, as Key Value");
else
MsgBox("myDict don't contains the list of String, as Key Value")
- 2 回答
- 0 關(guān)注
- 107 瀏覽
添加回答
舉報
0/150
提交
取消