Tuple<T1,T2,T3,T4,T5>.IStructuralComparable.CompareTo 方法
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
利用指定的比較器將當前 Tuple<T1,T2,T3,T4,T5> 物件與指定物件比較，並回傳一個整數，表示目前物件在排序順序中是否在指定物件之前、之後或相同位置。
virtual int System.Collections.IStructuralComparable.CompareTo(System::Object ^ other, System::Collections::IComparer ^ comparer) = System::Collections::IStructuralComparable::CompareTo;int IStructuralComparable.CompareTo(object other, System.Collections.IComparer comparer);abstract member System.Collections.IStructuralComparable.CompareTo : obj * System.Collections.IComparer -> int
override this.System.Collections.IStructuralComparable.CompareTo : obj * System.Collections.IComparer -> intFunction CompareTo (other As Object, comparer As IComparer) As Integer Implements IStructuralComparable.CompareTo參數
- other
- Object
一個可以與當前實例比較的物件。
- comparer
- IComparer
一個提供自訂比較規則的物件。
傳回
一個帶符號整數，表示此實例的相對位置及其 other 排序順序，如下表所示。
| 價值 | 描述 |
|---|---|
| 一個負整數 | 此實例發生 other於 之前。
|
| 零 | 這個實例和 other 在排序順序中的位置相同。
|
| 一個正整數 | 此實例可得 other。
|
實作
例外狀況
other 不是 Tuple<T1,T2,T3,T4,T5> 物件。
範例
以下範例建立一個包含美式職業美式足球跑衛生涯統計資料的物件陣列 Tuple<T1,T2,T3,T4,T5> 。 這個五元組的組成部分包括球員姓名、他出賽的比賽場次、衝球或衝球嘗試次數、總獲得的碼數，以及達陣次數。 範例中每個元組的組成部分以未排序順序顯示，然後排序陣列，然後呼叫 ToString 以排序順序顯示每個元組。 為了排序陣列，範例定義了一個通用 YardsGained 類別，該類別實 IComparer 作介面，並依 Tuple<T1,T2,T3,T4,T5> 物件第四個組件（獲得的碼數）而非第一個組件的值，依照降序排序。 請注意，範例中並未直接呼叫該 IStructuralComparable.CompareTo 方法。 此方法由 方法 Array.Sort(Array, IComparer) 隱含呼叫，針對陣列中的每個元素。
using System;
using System.Collections;
using System.Collections.Generic;
public class YardsGained<T1, T2, T3, T4, T5> : IComparer
{
public int Compare(object x, object y)
{
Tuple<T1, T2, T3, T4, T5> tX = x as Tuple<T1, T2, T3, T4, T5>;
if (tX == null)
{
return 0;
}
else
{
Tuple<T1, T2, T3, T4, T5> tY = y as Tuple<T1, T2, T3, T4, T5>;
return -1 * Comparer<T4>.Default.Compare(tX.Item4, tY.Item4);
}
}
}
public class Example
{
public static void Main()
{
// Organization of runningBacks 5-tuple:
// Component 1: Player name
// Component 2: Number of games played
// Component 3: Number of attempts (carries)
// Component 4: Number of yards gained
// Component 5: Number of touchdowns
Tuple<string, int, int, int, int>[] runningBacks =
{ Tuple.Create("Payton, Walter", 190, 3838, 16726, 110),
Tuple.Create("Sanders, Barry", 153, 3062, 15269, 99),
Tuple.Create("Brown, Jim", 118, 2359, 12312, 106),
Tuple.Create("Dickerson, Eric", 144, 2996, 13259, 90),
Tuple.Create("Faulk, Marshall", 176, 2836, 12279, 100) };
// Display the array in unsorted order.
Console.WriteLine("The values in unsorted order:");
foreach (var runningBack in runningBacks)
Console.WriteLine(runningBack.ToString());
Console.WriteLine();
// Sort the array
Array.Sort(runningBacks, new YardsGained<string, int, int, int, int>());
// Display the array in sorted order.
Console.WriteLine("The values in sorted order:");
foreach (var runningBack in runningBacks)
Console.WriteLine(runningBack.ToString());
}
}
// The example displays the following output:
// The values in unsorted order:
// (Payton, Walter, 190, 3838, 16726, 110)
// (Sanders, Barry, 153, 3062, 15269, 99)
// (Brown, Jim, 118, 2359, 12312, 106)
// (Dickerson, Eric, 144, 2996, 13259, 90)
// (Faulk, Marshall, 176, 2836, 12279, 100)
//
// The values in sorted order:
// (Brown, Jim, 118, 2359, 12312, 106)
// (Dickerson, Eric, 144, 2996, 13259, 90)
// (Faulk, Marshall, 176, 2836, 12279, 100)
// (Payton, Walter, 190, 3838, 16726, 110)
// (Sanders, Barry, 153, 3062, 15269, 99)
open System
open System.Collections
open System.Collections.Generic
type YardsGained<'T1, 'T2, 'T3, 'T4, 'T5>() =
interface IComparer with
member _.Compare(x, y) =
match x with
| :? Tuple<'T1, 'T2, 'T3, 'T4, 'T5> as tX ->
let tY = y :?> Tuple<'T1, 'T2, 'T3, 'T4, 'T5>
-1 * Comparer<'T4>.Default.Compare(tX.Item4, tY.Item4)
| _ -> 0
// Organization of runningBacks 5-tuple:
// Component 1: Player name
// Component 2: Number of games played
// Component 3: Number of attempts (carries)
// Component 4: Number of yards gained
// Component 5: Number of touchdowns
let runningBacks =
[| Tuple.Create("Payton, Walter", 190, 3838, 16726, 110)
Tuple.Create("Sanders, Barry", 153, 3062, 15269, 99)
Tuple.Create("Brown, Jim", 118, 2359, 12312, 106)
Tuple.Create("Dickerson, Eric", 144, 2996, 13259, 90)
Tuple.Create("Faulk, Marshall", 176, 2836, 12279, 100) |]
// Display the array in unsorted order.
printfn "The values in unsorted order:"
for runningBack in runningBacks do
printfn $"{runningBack}"
printfn ""
// Sort the array
Array.Sort(runningBacks, YardsGained<string, int, int, int, int>())
// Display the array in sorted order.
printfn "The values in sorted order:"
for runningBack in runningBacks do
printfn $"{runningBack}"
// The example displays the following output:
// The values in unsorted order:
// (Payton, Walter, 190, 3838, 16726, 110)
// (Sanders, Barry, 153, 3062, 15269, 99)
// (Brown, Jim, 118, 2359, 12312, 106)
// (Dickerson, Eric, 144, 2996, 13259, 90)
// (Faulk, Marshall, 176, 2836, 12279, 100)
//
// The values in sorted order:
// (Brown, Jim, 118, 2359, 12312, 106)
// (Dickerson, Eric, 144, 2996, 13259, 90)
// (Faulk, Marshall, 176, 2836, 12279, 100)
// (Payton, Walter, 190, 3838, 16726, 110)
// (Sanders, Barry, 153, 3062, 15269, 99)
Imports System.Collections
Imports System.Collections.Generic
Public Class YardsGained(Of T1, T2, T3, T4, T5) : Implements IComparer
Public Function Compare(x As Object, y As Object) As Integer _
Implements IComparer.Compare
Dim tX As Tuple(Of T1, T2, T3, T4, T5) = TryCast(x, Tuple(Of T1, T2, T3, T4, T5))
If tX Is Nothing Then
Return 0
Else
Dim tY As Tuple(Of T1, T2, T3, T4, T5) = DirectCast(y, Tuple(Of T1, T2, T3, T4, T5))
Return -1 * Comparer(Of T4).Default.Compare(tx.Item4, tY.Item4)
End If
End Function
End Class
Module Example
Public Sub Main()
' Organization of runningBacks 5-tuple:
' Component 1: Player name
' Component 2: Number of games played
' Component 3: Number of attempts (carries)
' Component 4: Number of yards gained
' Component 5: Number of touchdowns
Dim runningBacks() =
{ Tuple.Create("Payton, Walter", 190, 3838, 16726, 110),
Tuple.Create("Sanders, Barry", 153, 3062, 15269, 99),
Tuple.Create("Brown, Jim", 118, 2359, 12312, 106),
Tuple.Create("Dickerson, Eric", 144, 2996, 13259, 90),
Tuple.Create("Faulk, Marshall", 176, 2836, 12279, 100) }
' Display the array in unsorted order.
Console.WriteLine("The values in unsorted order:")
For Each runningBack In runningBacks
Console.WriteLine(runningBack.ToString())
Next
Console.WriteLine()
' Sort the array
Array.Sort(runningBacks, New YardsGained(Of String, Integer, Integer, Integer, Integer)())
' Display the array in sorted order.
Console.WriteLine("The values in sorted order:")
For Each runningBack In runningBacks
Console.WriteLine(runningBack.ToString())
Next
End Sub
End Module
' The example displays the following output:
' The values in unsorted order:
' (Payton, Walter, 190, 3838, 16726, 110)
' (Sanders, Barry, 153, 3062, 15269, 99)
' (Brown, Jim, 118, 2359, 12312, 106)
' (Dickerson, Eric, 144, 2996, 13259, 90)
' (Faulk, Marshall, 176, 2836, 12279, 100)
'
' The values in sorted order:
' (Payton, Walter, 190, 3838, 16726, 110)
' (Sanders, Barry, 153, 3062, 15269, 99)
' (Dickerson, Eric, 144, 2996, 13259, 90)
' (Brown, Jim, 118, 2359, 12312, 106)
' (Faulk, Marshall, 176, 2836, 12279, 100)
備註
此成員為明確介面成員實作。 它只能在實 Tuple<T1,T2,T3,T4,T5> 例投射到 IStructuralComparable 介面時使用。
雖然此方法可直接呼叫，但最常由包含 IComparer 參數以排序集合成員的集合排序方法呼叫。 例如，它由Array.Sort(Array, IComparer)使用Add建構子實例化的物件的方法和SortedList方法SortedList.SortedList(IComparer)所呼叫。
注意事項
此 IStructuralComparable.CompareTo 方法主要用於排序操作。 當比較的主要目的是判斷兩個物體是否相等時，不應使用此方法。 要判斷兩個物體是否相等，請呼叫該 IStructuralEquatable.Equals(Object, IEqualityComparer) 方法。
