双向字典不区分大小写？

发布于 2024-10-18 23:13:12 字数 1998 浏览 3 评论 0原文

问题：我使用在这里找到的双向字典类：这个

问题是，我需要 - 不区分大小写（StringComparer.OrdinalIgnoreCase）

我想扩展它以覆盖 IEqualityComparer 构造函数。我已将其转换为 VB（就像魅力一样），但我在实现比较器“传输”时遇到了麻烦。

问题是，在我的参数中：

ByVal x As System.Collections.Generic.IEqualityComparer(Of TKey)

但是字典 secondaryToFirst 的类型为 TValue, TKey，这会杀死我的 IEqualityComparer，它需要为 TValue 而不是 TKey 类型...

我如何对这个比较器进行类型转换？

如果某个地方有另一个 BiDictionaryOneToOne 类，并且不区分大小写，那也没关系（只要该库的大小/内存消耗和 .NET 2.0 不是巨大的）

Public Class BiDictionaryOneToOne(Of TKey, TValue)


    Public Sub New(ByVal x As System.Collections.Generic.IEqualityComparer(Of TKey))
        Dim y As System.Collections.Generic.IEqualityComparer(Of TValue) = StringComparer.OrdinalIgnoreCase

        firstToSecond = New Dictionary(Of TKey, TValue)(x)
        secondToFirst = New Dictionary(Of TValue, TKey)(y)
    End Sub

编辑：
好吧，当然这只有在 TKey & 的情况下才有可能。正如 John 指出的那样，TValue 是字符串类型，但如果它们相同，仍然可以使用 try/catch ，如下所示：

Public Sub New(ByVal cmpFirstDirection As System.Collections.Generic.IEqualityComparer(Of TKey))

    Try
        Dim cmpOppositeDirection As System.Collections.Generic.IEqualityComparer(Of TValue) = CType(cmpFirstDirection, System.Collections.Generic.IEqualityComparer(Of TValue))
        firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
        secondToFirst = New Dictionary(Of TValue, TKey)(cmpOppositeDirection)
    Catch ex As Exception
        firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
        secondToFirst = New Dictionary(Of TValue, TKey)
    End Try

End Sub



Public Sub New(ByVal cmpFirstDirection As System.Collections.Generic.IEqualityComparer(Of TKey), ByVal cmpOppositeDirection As System.Collections.Generic.IEqualityComparer(Of TValue))
    firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
    secondToFirst = New Dictionary(Of TValue, TKey)(cmpOppositeDirection)
End Sub

原文

Question: I use the bidirectional dicionary class I found here:
Bidirectional 1 to 1 Dictionary in C#

The problem is, I need this - case insensitive (StringComparer.OrdinalIgnoreCase)

I wanna extend it to cover the IEqualityComparer constructor.
I've converted it to VB (works like a charm), but I have trouble implementing the comparer 'transfer'.

The problem is, in the parameters I have:

ByVal x As System.Collections.Generic.IEqualityComparer(Of TKey)

But the dicionary secondToFirst is of type TValue, TKey, which kills my IEqualityComparer, which needs to be of type TValue instead of TKey...

How do I typecast this comparer ?

If somewhere there's another class for BiDictionaryOneToOne, with case-insensitiveness, that's also OK (as long as that library isn't monumental in size/memory consumption and .NET 2.0)

Public Class BiDictionaryOneToOne(Of TKey, TValue)


    Public Sub New(ByVal x As System.Collections.Generic.IEqualityComparer(Of TKey))
        Dim y As System.Collections.Generic.IEqualityComparer(Of TValue) = StringComparer.OrdinalIgnoreCase

        firstToSecond = New Dictionary(Of TKey, TValue)(x)
        secondToFirst = New Dictionary(Of TValue, TKey)(y)
    End Sub

Edit:
OK, of course it's only possible if TKey & TValue are of type string, as John points out, but in case they are the same, it's still possible with try/catch like this:

Public Sub New(ByVal cmpFirstDirection As System.Collections.Generic.IEqualityComparer(Of TKey))

    Try
        Dim cmpOppositeDirection As System.Collections.Generic.IEqualityComparer(Of TValue) = CType(cmpFirstDirection, System.Collections.Generic.IEqualityComparer(Of TValue))
        firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
        secondToFirst = New Dictionary(Of TValue, TKey)(cmpOppositeDirection)
    Catch ex As Exception
        firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
        secondToFirst = New Dictionary(Of TValue, TKey)
    End Try

End Sub



Public Sub New(ByVal cmpFirstDirection As System.Collections.Generic.IEqualityComparer(Of TKey), ByVal cmpOppositeDirection As System.Collections.Generic.IEqualityComparer(Of TValue))
    firstToSecond = New Dictionary(Of TKey, TValue)(cmpFirstDirection)
    secondToFirst = New Dictionary(Of TValue, TKey)(cmpOppositeDirection)
End Sub

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平生欢 2024-10-25 23:13:12

您正在尝试编写一个通用双字典，它可以具有任何类型的键/值对组合。使用 StringComparer 比较两个整数是什么意思？我建议您更改构造函数以采用两个 IEqualityComparer，一个用于 TKey，一个用于 TValue。然后，您可以通过传入两个适当的 IEqualityComparer(Of String) 值来创建不区分大小写的 BiDictionaryOneToOne(Of String, String)。