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

参考

定义

命名空间:: System

程序集:: System.Runtime.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

Source:: Tuple.cs

Source:: Tuple.cs

Source:: Tuple.cs

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

使用指定的比较器将当前的 Tuple<T1,T2,T3,T4> 对象与指定对象进行比较，并返回一个整数，该整数指示当前对象在排序顺序中的位置是在指定对象之前、之后还是与其相同。

 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

参数

other: Object

要与当前实例进行比较的对象。

comparer: IComparer

提供用于比较的自定义规则的对象。

Int32

一个带符号整数，指示此实例和 other 在排序顺序中的相对位置，如下表所示。

值	说明
负整数	此实例位于 `other` 之前。
零	此实例在排序顺序中的位置与 `other` 相同。
正整数	此实例位于 `other` 之后。

实现

CompareTo(Object, IComparer)

例外

ArgumentException

other 不是 Tuple<T1,T2,T3,T4> 对象。

示例

以下示例创建一个对象数组 Tuple<T1,T2,T3,T4> ，其中包含有关棒球投手的统计数据。数据项包括投手的姓名、投球的局数、投手的平均得分 (投手每场比赛) 允许的平均运行次数，以及投手放弃的命中次数。该示例按未排序顺序显示数组中每个元组的组件，对数组进行排序，然后调用 ToString 以按排序顺序显示每个元组的值。为了对数组进行排序，该示例定义了一个实现 IComparer 接口的泛型PitcherComparer类，并按对象第三个组件的值（ (获得的平均运行) 而不是第一个组件）对对象进行升序排序Tuple<T1,T2,T3,T4>。请注意，该示例不直接调用 IStructuralComparable.CompareTo(Object, IComparer) 方法。此方法由 Array.Sort(Array, IComparer) 数组中的每个元素的方法隐式调用。

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)

注解

此成员是显式接口成员的实现。它只能在 Tuple<T1,T2,T3,T4> 实例被强制转换为 IStructuralComparable 接口时使用。

虽然此方法可以直接调用，但它最常由包含参数的集合排序方法 IComparer 调用，以便对集合的成员进行排序。例如，它由 Array.Sort(Array, IComparer) 方法以及Add使用 SortedList.SortedList(IComparer) 构造函数实例化的对象的方法SortedList调用。

注意

方法 IStructuralComparable.CompareTo(Object, IComparer) 适用于排序操作。当比较的主要目的是确定两个对象是否相等时，不应使用它。若要确定两个对象是否相等，请调用 IStructuralEquatable.Equals(Object, IEqualityComparer) 方法。

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

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实现

例外

示例

注解

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