Tuple<T1,T2,T3,T4> Tuple<T1,T2,T3,T4> Tuple<T1,T2,T3,T4> Tuple<T1,T2,T3,T4> Class

定义

表示 4 元组,即四元组。Represents a 4-tuple, or quadruple.

generic <typename T1, typename T2, typename T3, typename T4>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable
[System.Serializable]
public class Tuple<T1,T2,T3,T4> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
type Tuple<'T1, 'T2, 'T3, 'T4> = class
    interface IStructuralEquatable
    interface IStructuralComparable
    interface IComparable
Public Class Tuple(Of T1, T2, T3, T4)
Implements IComparable, IStructuralComparable, IStructuralEquatable

类型参数

T1

此元组的第一个组件的类型。The type of the tuple's first component.

T2

此元组的第二个组件的类型。The type of the tuple's second component.

T3

此元组的第三个组件的类型。The type of the tuple's third component.

T4

此元组的第四个组件的类型。The type of the tuple's fourth component.

继承
Tuple<T1,T2,T3,T4>Tuple<T1,T2,T3,T4>Tuple<T1,T2,T3,T4>Tuple<T1,T2,T3,T4>
属性
实现

注解

元组是具有特定数量和值序列的数据结构。A tuple is a data structure that has a specific number and sequence of values. Tuple<T1,T2,T3,T4>类表示 4 元组,或四倍,这是具有四个组件的元组。The Tuple<T1,T2,T3,T4> class represents a 4-tuple, or quadruple, which is a tuple that has four components.

可以实例化Tuple<T1,T2,T3,T4>对象通过调用Tuple<T1,T2,T3,T4>构造函数或静态Tuple.Create<T1,T2,T3,T4>(T1, T2, T3, T4)方法。You can instantiate a Tuple<T1,T2,T3,T4> object by calling either the Tuple<T1,T2,T3,T4> constructor or the static Tuple.Create<T1,T2,T3,T4>(T1, T2, T3, T4) method. 您可以使用只读的检索的值元组的组件Item1Item2Item3,和Item4实例属性。You can retrieve the value of the tuple's components by using the read-only Item1, Item2, Item3, and Item4 instance properties.

元组通常使用四个不同的方式:Tuples are commonly used in four different ways:

  • 表示一组数据。To represent a single set of data. 例如,元组可以表示的数据库记录,并且其组件可以表示每个字段的记录。For example, a tuple can represent a database record, and its components can represent individual fields of the record.

  • 若要提供轻松访问和数据集的操作。To provide easy access to, and manipulation of, a data set. 下面的示例定义一个数组Tuple<T1,T2,T3,T4>对象包含棒球投手、 投球数和自责 (评分而无需调查的错误),数量的名称,并点击放弃了。The following example defines an array of Tuple<T1,T2,T3,T4> objects that contain the names of baseball pitchers, the number of innings they pitched, and the number of earned runs (runs that scored without fielding errors), and hits that they gave up. 数组传递给ComputeStatistics方法,以计算每个投手平均 (放弃了 9 个局游戏中运行的平均位数) 上,并放弃每局的命中数的平均数。The array is passed to the ComputeStatistics method, which calculates each pitcher's earned run average (the average number of runs given up in a nine-inning game), and the average number of hits given up per inning. 该方法还使用这两个平均值计算假设的有效性平均值。The method also uses these two averages to compute a hypothetical effectiveness average.

    using System;
    using System.Collections.Generic;
    
    public class Example
    {
       public static void Main()
       {
          Tuple<string, decimal, int, int>[] pitchers  =  
               { Tuple.Create("McHale, Joe", 240.1m, 221, 96),
                 Tuple.Create("Paul, Dave", 233.1m, 231, 84), 
                 Tuple.Create("Williams, Mike", 193.2m, 183, 86),
                 Tuple.Create("Blair, Jack", 168.1m, 146, 65), 
                 Tuple.Create("Henry, Walt", 140.1m, 96, 30),
                 Tuple.Create("Lee, Adam", 137.2m, 109, 45),
                 Tuple.Create("Rohr, Don", 101.0m, 110, 42) };
          Tuple<string, double, double, double>[] results= ComputeStatistics(pitchers);
    
          // Display the results.
          Console.WriteLine("{0,-20} {1,9} {2,11} {3,15}\n", 
                            "Pitcher", "ERA", "Hits/Inn.", "Effectiveness");
          foreach (var result in results)
             Console.WriteLine("{0,-20} {1,9:F2} {2,11:F2} {3,15:F2}",  
                            result.Item1, result.Item2, result.Item3, result.Item4);
       }
    
       private static Tuple<string, double, double, double>[] ComputeStatistics(Tuple<string, decimal, int, int>[] pitchers)
       {    
          var list = new List<Tuple<string, double, double, double>>();
          Tuple<string, double, double, double> result;
    
          foreach (var pitcher in pitchers)
          {
             // Decimal portion of innings pitched represents 1/3 of an inning
             double innings = (double) Math.Truncate(pitcher.Item2);
             innings = innings + (((double)pitcher.Item2 - innings) * .33);
             
             double ERA = pitcher.Item4/innings * 9;
             double hitsPerInning = pitcher.Item3/innings;
             double EI = (ERA * 2 + hitsPerInning * 9)/3;
             result = new Tuple<string, double, double, double>
                               (pitcher.Item1, ERA, hitsPerInning, EI);
             list.Add(result);
          }
          return list.ToArray();
       }
    }
    // The example displays the following output;
    //       Pitcher                    ERA   Hits/Inn.   Effectiveness
    //       
    //       McHale, Joe               3.60        0.92            5.16
    //       Paul, Dave                3.24        0.99            5.14
    //       Williams, Mike            4.01        0.95            5.52
    //       Blair, Jack               3.48        0.87            4.93
    //       Henry, Walt               1.93        0.69            3.34
    //       Lee, Adam                 2.95        0.80            4.36
    //       Rohr, Don                 3.74        1.09            5.76
    
    Imports System.Collections.Generic
    
    Module Example
       Public Sub Main()
          Dim pitchers() =  
                   { Tuple.Create("McHale, Joe", 240.1d, 221, 96),
                     Tuple.Create("Paul, Dave", 233.1d, 231, 84), 
                     Tuple.Create("Williams, Mike", 193.2d, 183, 86),
                     Tuple.Create("Blair, Jack", 168.1d, 146, 65), 
                     Tuple.Create("Henry, Walt", 140.1d, 96, 30),
                     Tuple.Create("Lee, Adam", 137.2d, 109, 45),
                     Tuple.Create("Rohr, Don", 101.0d, 110, 42) }
          Dim results() = ComputeStatistics(pitchers)
    
          ' Display the results.
          Console.WriteLine("{0,-20} {1,9} {2,11} {3,15}", "Pitcher", "ERA", "Hits/Inn.", "Effectiveness")
          Console.WriteLine()
          For Each result In results
             Console.WriteLine("{0,-20} {1,9:F2} {2,11:F2} {3,15:F2}",  
                            result.Item1, result.Item2, result.Item3, result.Item4)
          Next
       End Sub
       
       Private Function ComputeStatistics(pitchers() As Tuple(Of String, Decimal, Integer, Integer)) _ 
                                    As Tuple(Of String, Double, Double, Double)()
          Dim list As New List(Of Tuple(Of String, Double, Double, Double))
          Dim result As Tuple(Of String, Double, Double, Double)
    
          For Each pitcher As Tuple(Of String, Decimal, Integer, Integer) In pitchers
             ' Decimal portion of innings pitched represents 1/3 of an inning
             Dim innings As Double = CDbl(Math.Truncate(pitcher.Item2))
             innings = innings + ((pitcher.Item2 - innings) * .33)
             
             Dim ERA As Double = pitcher.Item4/innings * 9
             Dim hitsPerInning As Double = pitcher.Item3/innings
             Dim EI As Double = (ERA * 2 + hitsPerInning * 9)/3
             result = New Tuple(Of String, Double, Double, Double) _
                               (pitcher.Item1, ERA, hitsPerInning, EI)
             list.Add(result) 
          Next
          Return list.ToArray()
       End Function
    End Module
    ' The example displays the following output:
    '       Pitcher                    ERA   Hits/Inn.   Effectiveness
    '       
    '       McHale, Joe               3.60        0.92            5.16
    '       Paul, Dave                3.24        0.99            5.14
    '       Williams, Mike            4.01        0.95            5.52
    '       Blair, Jack               3.48        0.87            4.93
    '       Henry, Walt               1.93        0.69            3.34
    '       Lee, Adam                 2.95        0.80            4.36
    '       Rohr, Don                 3.74        1.09            5.76
    
  • 若要从无需使用方法返回多个值out参数 (在 C#) 或ByRef参数 (在 Visual Basic 中)。To return multiple values from a method without the use of out parameters (in C#) or ByRef parameters (in Visual Basic). 例如,前面的示例在一个数组中返回名称投手,其计算统计信息Tuple<T1,T2,T3,T4>对象。For example, the previous example returns its computed statistics, along with the name of the pitcher, in an array of Tuple<T1,T2,T3,T4> objects.

  • 若要将多个值传递给通过单个参数的方法。To pass multiple values to a method through a single parameter. 例如,Thread.Start(Object)方法只有一个参数,可提供一个值,则该线程在启动时执行的方法。For example, the Thread.Start(Object) method has a single parameter that lets you supply one value to the method that the thread executes at startup. 如果提供Tuple<T1,T2,T3,T4>对象作为方法自变量,则可以提供具有四个项目的数据的线程的启动例程。If you supply a Tuple<T1,T2,T3,T4> object as the method argument, you can supply the thread's startup routine with four items of data.

构造函数

Tuple<T1,T2,T3,T4>(T1, T2, T3, T4) Tuple<T1,T2,T3,T4>(T1, T2, T3, T4) Tuple<T1,T2,T3,T4>(T1, T2, T3, T4) Tuple<T1,T2,T3,T4>(T1, T2, T3, T4)

初始化 Tuple<T1,T2,T3,T4> 类的新实例。Initializes a new instance of the Tuple<T1,T2,T3,T4> class.

属性

Item1 Item1 Item1 Item1

获取当前 Tuple<T1,T2,T3,T4> 对象的第一个分量的值。Gets the value of the current Tuple<T1,T2,T3,T4> object's first component.

Item2 Item2 Item2 Item2

获取当前 Tuple<T1,T2,T3,T4> 对象的第二个分量的值。Gets the value of the current Tuple<T1,T2,T3,T4> object's second component.

Item3 Item3 Item3 Item3

获取当前 Tuple<T1,T2,T3,T4> 对象的第三个分量的值。Gets the value of the current Tuple<T1,T2,T3,T4> object's third component.

Item4 Item4 Item4 Item4

获取当前 Tuple<T1,T2,T3,T4> 对象的第四个分量的值。Gets the value of the current Tuple<T1,T2,T3,T4> object's fourth component.

方法

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

返回一个值,该值指示当前的 Tuple<T1,T2,T3,T4> 对象是否与指定对象相等。Returns a value that indicates whether the current Tuple<T1,T2,T3,T4> object is equal to a specified object.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

返回当前 Tuple<T1,T2,T3,T4> 对象的哈希代码。Returns the hash code for the current Tuple<T1,T2,T3,T4> object.

GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

返回表示此 Tuple<T1,T2,T3,T4> 实例的值的字符串。Returns a string that represents the value of this Tuple<T1,T2,T3,T4> instance.

显式界面实现

IComparable.CompareTo(Object) IComparable.CompareTo(Object) IComparable.CompareTo(Object) IComparable.CompareTo(Object)

比较当前 Tuple<T1,T2,T3,T4> 对象与指定对象,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、之后还是在与指定对象相同的位置。Compares the current Tuple<T1,T2,T3,T4> object to a specified object and returns an integer that indicates whether the current object is before, after, or in the same position as the specified object in the sort order.

IStructuralComparable.CompareTo(Object, IComparer) IStructuralComparable.CompareTo(Object, IComparer) IStructuralComparable.CompareTo(Object, IComparer) IStructuralComparable.CompareTo(Object, IComparer)

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。Compares the current Tuple<T1,T2,T3,T4> object to a specified object by using a specified comparer and returns an integer that indicates whether the current object is before, after, or in the same position as the specified object in the sort order.

IStructuralEquatable.Equals(Object, IEqualityComparer) IStructuralEquatable.Equals(Object, IEqualityComparer) IStructuralEquatable.Equals(Object, IEqualityComparer) IStructuralEquatable.Equals(Object, IEqualityComparer)

返回一个值,该值根据指定的比较方法指示当前的 Tuple<T1,T2,T3,T4> 对象是否与指定对象相等。Returns a value that indicates whether the current Tuple<T1,T2,T3,T4> object is equal to a specified object based on a specified comparison method.

IStructuralEquatable.GetHashCode(IEqualityComparer) IStructuralEquatable.GetHashCode(IEqualityComparer) IStructuralEquatable.GetHashCode(IEqualityComparer) IStructuralEquatable.GetHashCode(IEqualityComparer)

使用指定的计算方法计算当前 Tuple<T1,T2,T3,T4> 对象的哈希代码。Calculates the hash code for the current Tuple<T1,T2,T3,T4> object by using a specified computation method.

ITuple.Item[Int32] ITuple.Item[Int32] ITuple.Item[Int32] ITuple.Item[Int32]

获取指定 Tuple 元素的值。Gets the value of the specified Tuple element.

ITuple.Length ITuple.Length ITuple.Length ITuple.Length

获取 Tuple 中的元素数。Gets the number of elements in the Tuple.

Extension Methods

Deconstruct<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>, T1, T2, T3, T4) Deconstruct<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>, T1, T2, T3, T4) Deconstruct<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>, T1, T2, T3, T4) Deconstruct<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>, T1, T2, T3, T4)

将具有 4 个元素的元组解构为不同的变量。Deconstructs a tuple with 4 elements into separate variables.

ToValueTuple<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>) ToValueTuple<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>) ToValueTuple<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>) ToValueTuple<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>)

Tuple 类的实例转换为 ValueTuple 结构的实例。Converts an instance of the Tuple class to an instance of the ValueTuple structure.

适用于

另请参阅