Tuple<T1,T2,T3,T4>.IStructuralComparable.CompareTo 方法

參考

定義

命名空間:: System

組件:: System.Runtime.dll

組件:: mscorlib.dll

組件:: netstandard.dll

來源:: Tuple.cs

來源:: Tuple.cs

來源:: Tuple.cs

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。

使用指定的比較子將目前的 Tuple<T1,T2,T3,T4> 物件和指定的物件進行比較，並且傳回一個整數，表示目前的物件在排序順序中位於指定之物件的前面、後面還是相的位置。

 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 -> int

Function CompareTo (other As Object, comparer As IComparer) As Integer Implements IStructuralComparable.CompareTo

參數

other: Object

要與目前執行個體比較的物件。

comparer: IComparer

提供自訂規則進行比較的物件。

傳回

Int32

帶正負號的整數，可指出此執行個體以及排序次序中 other 的相對位置，如下表所示。

值	描述
負整數	這個執行個體位於 `other` 之前。
零	這個執行個體和 `other` 的排序位置相同。
正整數	這個執行個體位於 `other` 之後。

實作

CompareTo(Object, IComparer)

例外狀況

ArgumentException

other 不是 Tuple<T1,T2,T3,T4> 物件。

範例

下列範例會建立物件的陣列 Tuple<T1,T2,T3,T4> ，其中包含有關足球手的統計資料。資料項目包括玩家名稱、推入的旅館數目、玩家所獲得的平均執行平均 (玩家允許每個遊戲的平均回合數) ，以及玩家已放棄的點擊次數。此範例會以未排序的順序顯示陣列中每個 Tuple 的元件、排序陣列，然後呼叫 ToString 以依排序次序顯示每個 Tuple 的值。為了排序陣列，此範例會定義泛型 PitcherComparer 類別，該類別會實 IComparer 作介面，並以第三個元件的值遞增順序排序 Tuple<T1,T2,T3,T4> 物件， (所獲得的執行平均) 而不是第一個元件。請注意，此範例不會直接呼叫 IStructuralComparable.CompareTo(Object, IComparer) 方法。這個方法是由 Array.Sort(Array, IComparer) 陣列中每個元素的方法隱含呼叫。

using System;
using System.Collections;
using System.Collections.Generic;

public class PitcherComparer<T1, T2, T3, T4> : IComparer
{
   public int Compare(object x, object y)
   {
      Tuple<T1, T2, T3, T4> tX = x as Tuple<T1, T2, T3, T4>;
      if (tX == null)
      { 
         return 0;
      }   
      else
      {
         Tuple<T1, T2, T3, T4> tY = y as Tuple<T1, T2, T3, T4>;
         return Comparer<T3>.Default.Compare(tX.Item3, tY.Item3);             
      }
   }
}

public class Example
{
   public static void Main()
   {
      Tuple<string, double, double, int>[] pitchers = 
                    { Tuple.Create("McHale, Joe", 240.1, 3.60, 221),
                      Tuple.Create("Paul, Dave", 233.1, 3.24, 231), 
                      Tuple.Create("Williams, Mike", 193.2, 4.00, 183),
                      Tuple.Create("Blair, Jack", 168.1, 3.48, 146), 
                      Tuple.Create("Henry, Walt", 140.1, 1.92, 96),
                      Tuple.Create("Lee, Adam", 137.2, 2.94, 109),
                      Tuple.Create("Rohr, Don", 101.0, 3.74, 110) };

      Console.WriteLine("The values in unsorted order:");
      foreach (var pitcher in pitchers)
         Console.WriteLine(pitcher.ToString());

      Console.WriteLine();

      Array.Sort(pitchers, new PitcherComparer<string, double, double, int>());

      Console.WriteLine("The values sorted by earned run average (component 3):");
      foreach (var pitcher in pitchers)
         Console.WriteLine(pitcher.ToString());
   }
}
// The example displays the following output;
//       The values in unsorted order:
//       (McHale, Joe, 240.1, 3.6, 221)
//       (Paul, Dave, 233.1, 3.24, 231)
//       (Williams, Mike, 193.2, 4, 183)
//       (Blair, Jack, 168.1, 3.48, 146)
//       (Henry, Walt, 140.1, 1.92, 96)
//       (Lee, Adam, 137.2, 2.94, 109)
//       (Rohr, Don, 101, 3.74, 110)
//       
//       The values sorted by earned run average (component 3):
//       (Henry, Walt, 140.1, 1.92, 96)
//       (Lee, Adam, 137.2, 2.94, 109)
//       (Rohr, Don, 101, 3.74, 110)
//       (Blair, Jack, 168.1, 3.48, 146)
//       (McHale, Joe, 240.1, 3.6, 221)
//       (Paul, Dave, 233.1, 3.24, 231)
//       (Williams, Mike, 193.2, 4, 183)

open System
open System.Collections
open System.Collections.Generic

type PitcherComparer<'T1, 'T2, 'T3, 'T4>() =
    interface IComparer with
        member _.Compare(x: obj, y: obj) =
            match x with
            | :? Tuple<'T1, 'T2, 'T3, 'T4> as tX ->
                let tY = y :?> Tuple<'T1, 'T2, 'T3, 'T4>
                Comparer<'T3>.Default.Compare(tX.Item3, tY.Item3)             
            | _ -> 0

let pitchers = 
    [| Tuple.Create("McHale, Joe", 240.1, 3.60, 221)
       Tuple.Create("Paul, Dave", 233.1, 3.24, 231)
       Tuple.Create("Williams, Mike", 193.2, 4.00, 183)
       Tuple.Create("Blair, Jack", 168.1, 3.48, 146)
       Tuple.Create("Henry, Walt", 140.1, 1.92, 96)
       Tuple.Create("Lee, Adam", 137.2, 2.94, 109)
       Tuple.Create("Rohr, Don", 101.0, 3.74, 110) |]

printfn "The values in unsorted order:"
for pitcher in pitchers do
    printfn $"{pitcher}"

printfn ""

Array.Sort(pitchers, PitcherComparer<string, double, double, int>())

printfn "The values sorted by earned run average (component 3):"
for pitcher in pitchers do
    printfn $"{pitcher}"
// The example displays the following output
//       The values in unsorted order:
//       (McHale, Joe, 240.1, 3.6, 221)
//       (Paul, Dave, 233.1, 3.24, 231)
//       (Williams, Mike, 193.2, 4, 183)
//       (Blair, Jack, 168.1, 3.48, 146)
//       (Henry, Walt, 140.1, 1.92, 96)
//       (Lee, Adam, 137.2, 2.94, 109)
//       (Rohr, Don, 101, 3.74, 110)
//       
//       The values sorted by earned run average (component 3):
//       (Henry, Walt, 140.1, 1.92, 96)
//       (Lee, Adam, 137.2, 2.94, 109)
//       (Rohr, Don, 101, 3.74, 110)
//       (Blair, Jack, 168.1, 3.48, 146)
//       (McHale, Joe, 240.1, 3.6, 221)
//       (Paul, Dave, 233.1, 3.24, 231)
//       (Williams, Mike, 193.2, 4, 183)

Imports System.Collections
Imports System.Collections.Generic

Public Class PitcherComparer(Of T1, T2, T3, T4) : Implements IComparer
   Public Function Compare(x As Object, y As Object) As Integer _
                   Implements IComparer.Compare
      Dim tX As Tuple(Of T1, T2, T3) = TryCast(x, Tuple(Of T1, T2, T3))
      If tX Is Nothing Then
         Return 0
      Else
         Dim tY As Tuple(Of T1, T2, T3) = DirectCast(y, Tuple(Of T1, T2, T3))
         Return Comparer(Of T3).Default.Compare(tx.Item3, tY.Item3)             
      End If
   End Function
End Class

Module Example
   Public Sub Main()
      Dim pitchers() = 
                { Tuple.Create("McHale, Joe", 240.1, 3.60, 221),
                  Tuple.Create("Paul, Dave", 233.1, 3.24, 231), 
                  Tuple.Create("Williams, Mike", 193.2, 4.00, 183),
                  Tuple.Create("Blair, Jack", 168.1, 3.48, 146), 
                  Tuple.Create("Henry, Walt", 140.1, 1.92, 96),
                  Tuple.Create("Lee, Adam", 137.2, 2.94, 109),
                  Tuple.Create("Rohr, Don", 101.0, 3.74, 110) }

      Console.WriteLine("The values in unsorted order:")
      For Each pitcher In pitchers
         Console.WriteLine(pitcher.ToString())
      Next
      Console.WriteLine()

      Array.Sort(pitchers, New PitcherComparer(Of String, Double, Double, Integer)())

      Console.WriteLine("The values sorted by earned run average (component 3):")
      For Each pitcher In pitchers
         Console.WriteLine(pitcher.ToString())
      Next
   End Sub
End Module
' The example displays the following output;
'       The values in unsorted order:
'       (McHale, Joe, 240.1, 3.6, 221)
'       (Paul, Dave, 233.1, 3.24, 231)
'       (Williams, Mike, 193.2, 4, 183)
'       (Blair, Jack, 168.1, 3.48, 146)
'       (Henry, Walt, 140.1, 1.92, 96)
'       (Lee, Adam, 137.2, 2.94, 109)
'       (Rohr, Don, 101, 3.74, 110)
'       
'       The values sorted by earned run average (component 3):
'       (Henry, Walt, 140.1, 1.92, 96)
'       (Lee, Adam, 137.2, 2.94, 109)
'       (Rohr, Don, 101, 3.74, 110)
'       (Blair, Jack, 168.1, 3.48, 146)
'       (McHale, Joe, 240.1, 3.6, 221)
'       (Paul, Dave, 233.1, 3.24, 231)
'       (Williams, Mike, 193.2, 4, 183)

備註

這個成員是明確介面成員實作，只有在 Tuple<T1,T2,T3,T4> 執行個體轉換成 IStructuralComparable 介面時，才能使用這個成員。

雖然可以直接呼叫這個方法，但最常由集合排序方法呼叫，其中包含 IComparer 排序集合成員的參數。例如，它會由 Array.Sort(Array, IComparer) 方法呼叫，以及 Add 使用 SortedList.SortedList(IComparer) 建構函式具現化之 SortedList 物件的方法。

警告

方法 IStructuralComparable.CompareTo(Object, IComparer) 適用于排序作業。當比較的主要用途是判斷兩個物件是否相等時，不應該使用它。若要判斷兩個物件是否相等，請呼叫 IStructuralEquatable.Equals(Object, IEqualityComparer) 方法。

適用於

Tuple<T1,T2,T3,T4>.IStructuralComparable.CompareTo 方法

定義

參數

傳回

實作

例外狀況

範例

備註

適用於

意見反應

其他資源