Tuple<T1,T2,T3> 類別

定義

表示 3-Tuple 或三重 (Triple) 物件。Represents a 3-tuple, or triple.

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

類型參數

T1

Tuple 第 1 個元件的型別。The type of the tuple's first component.

T2

Tuple 第 2 個元件的型別。The type of the tuple's second component.

T3

Tuple 第 3 個元件的型別。The type of the tuple's third component.

繼承
Tuple<T1,T2,T3>
屬性
實作

備註

元組是一種資料結構, 具有特定的數目和值序列。A tuple is a data structure that has a specific number and sequence of values. Tuple<T1,T2,T3>類別代表3個元組, 或三層級, 這是具有三個元件的元組。The Tuple<T1,T2,T3> class represents a 3-tuple, or triple, which is a tuple that has three components.

您可以藉由Tuple<T1,T2,T3>呼叫Tuple<T1,T2,T3>函式或靜態Tuple.Create<T1,T2,T3>(T1, T2, T3)方法來具現化物件。You can instantiate a Tuple<T1,T2,T3> object by calling either the Tuple<T1,T2,T3> constructor or the static Tuple.Create<T1,T2,T3>(T1, T2, T3) method. 您可以使用唯讀Item1Item2Item3實例屬性來抓取元組元件的值。You can retrieve the values of the tuple's components by using the read-only Item1, Item2, and Item3 instance properties.

元組通常會以四種不同的方式使用:Tuples are commonly used in four different ways:

  • 表示單一資料集。To represent a single set of data. 例如, 元組可以代表資料庫記錄, 而且其元件可以代表記錄的個別欄位。For example, a tuple can represent a database record, and its components can represent individual fields of the record.

  • 提供資料集的輕鬆存取和操作。To provide easy access to, and manipulation of, a data set. 下列範例會定義Tuple<T1,T2,T3>物件的陣列, 其中包含學生姓名、其平均測試分數, 以及所採用的測試數目。The following example defines an array of Tuple<T1,T2,T3> objects that contain the names of students, their average test scores, and the number of tests taken. 陣列會傳遞至ComputeStatistics方法, 以計算測試分數的平均值和標準差。The array is passed to the ComputeStatistics method, which calculates the mean and standard deviation of the test scores.

    using System;
    
    public class Example
    {
       public static void Main()
       {
          Tuple<string, double, int>[] scores = 
                        { Tuple.Create("Jack", 78.8, 8),
                          Tuple.Create("Abbey", 92.1, 9), 
                          Tuple.Create("Dave", 88.3, 9),
                          Tuple.Create("Sam", 91.7, 8), 
                          Tuple.Create("Ed", 71.2, 5),
                          Tuple.Create("Penelope", 82.9, 8),
                          Tuple.Create("Linda", 99.0, 9),
                          Tuple.Create("Judith", 84.3, 9) };
          var result = ComputeStatistics(scores);
          Console.WriteLine("Mean score: {0:N2} (SD={1:N2}) (n={2})", 
                            result.Item2, result.Item3, result.Item1);
       }
    
       private static Tuple<int, double, double> ComputeStatistics(Tuple<string, double, int>[] scores) 
       {
          int n = 0;
          double sum = 0;
    
          // Compute the mean.
          foreach (var score in scores)
          {
             n += score.Item3;
             sum += score.Item2 * score.Item3;
          }
          double mean = sum / n;
          
          // Compute the standard deviation.
          double ss = 0;
          foreach (var score in scores)
          {
             ss = Math.Pow(score.Item2 - mean, 2);
          }
          double sd = Math.Sqrt(ss/scores.Length);
          return Tuple.Create(scores.Length, mean, sd);
       }
    }
    // The example displays the following output:
    //       Mean score: 87.02 (SD=0.96) (n=8)
    
    Module Example
       Public Sub Main()
          Dim scores() = 
                          { Tuple.Create("Jack", 78.8, 8),
                            Tuple.Create("Abbey", 92.1, 9), 
                            Tuple.Create("Dave", 88.3, 9),
                            Tuple.Create("Sam", 91.7, 8), 
                            Tuple.Create("Ed", 71.2, 5),
                            Tuple.Create("Penelope", 82.9, 8),
                            Tuple.Create("Linda", 99.0, 9),
                            Tuple.Create("Judith", 84.3, 9) }
          Dim result = ComputeStatistics(scores)
          Console.WriteLine("Mean score: {0:N2} (SD={1:N2}) (n={2})", 
                            result.Item2, result.Item3, result.Item1)
       End Sub
       
       Private Function ComputeStatistics(scores() As Tuple(Of String, Double, Integer)) _ 
                                    As Tuple(Of Integer, Double, Double)
          Dim n As Integer = 0      
          Dim sum As Double = 0
          
          ' Compute the mean.
          For Each score In scores
             n+= score.Item3 
             sum += score.Item2 * score.Item3
          Next     
          Dim mean As Double = sum / n
    
          ' Compute the standard deviation.
          Dim ss As Double = 0
          For Each score In scores
             ss = Math.Pow(score.Item2 - mean, 2)
          Next
          Dim sd As Double = Math.Sqrt(ss/scores.Length)
          Return Tuple.Create(scores.Length, mean, sd)
       End Function
    End Module
    ' The example displays the following output:
    '       Mean score: 87.02 (SD=0.96) (n=8)
    
  • 表示從方法傳回多個值, 而不使用out參數 (在C#中) ByRef或參數 (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, 上一個範例會傳回Tuple<T1,T2,T3>物件中的摘要測試分數統計資料。For example, the previous example returns its summary test score statistics in a Tuple<T1,T2,T3> object.

  • 透過單一參數, 將多個值傳遞至方法。To pass multiple values to a method through a single parameter. 例如, Thread.Start(Object)方法有單一參數, 可讓您為執行緒在啟動時執行的方法提供一個值。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. 如果您提供Tuple<T1,T2,T3>物件做為方法引數, 則可以提供執行緒的啟動常式, 其中包含三個數據專案。If you supply a Tuple<T1,T2,T3> object as the method argument, you can supply the thread's startup routine with three items of data.

建構函式

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

初始化 Tuple<T1,T2,T3> 類別的新執行個體。Initializes a new instance of the Tuple<T1,T2,T3> class.

屬性

Item1

取得目前 Tuple<T1,T2,T3> 物件之第一個元件的值。Gets the value of the current Tuple<T1,T2,T3> object's first component.

Item2

取得目前 Tuple<T1,T2,T3> 物件之第二個元件的值。Gets the value of the current Tuple<T1,T2,T3> object's second component.

Item3

取得目前 Tuple<T1,T2,T3> 物件之第三個元件的值。Gets the value of the current Tuple<T1,T2,T3> object's third component.

方法

Equals(Object)

傳回值,這個值表示目前的 Tuple<T1,T2,T3> 物件是否等於指定的物件。Returns a value that indicates whether the current Tuple<T1,T2,T3> object is equal to a specified object.

GetHashCode()

傳回目前 Tuple<T1,T2,T3> 物件的雜湊碼。Returns the hash code for the current Tuple<T1,T2,T3> object.

GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

傳回字串,表示這個 Tuple<T1,T2,T3> 執行個體的值。Returns a string that represents the value of this Tuple<T1,T2,T3> instance.

明確介面實作

IComparable.CompareTo(Object)

將目前的 Tuple<T1,T2,T3> 物件與指定的物件比較,並傳回可指出目前物件在排序次序中,是否在指定物件之前、之後或者相同之位置的整數。Compares the current Tuple<T1,T2,T3> 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)

使用指定的比較子將目前的 Tuple<T1,T2,T3> 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。Compares the current Tuple<T1,T2,T3> 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)

傳回值,這個值表示依據指定的比較方法,目前的 Tuple<T1,T2,T3> 物件是否等於指定的物件。Returns a value that indicates whether the current Tuple<T1,T2,T3> object is equal to a specified object based on a specified comparison method.

IStructuralEquatable.GetHashCode(IEqualityComparer)

使用指定的計算方法,計算目前 Tuple<T1,T2,T3> 物件的雜湊碼。Calculates the hash code for the current Tuple<T1,T2,T3> object by using a specified computation method.

ITuple.Item[Int32]

取得指定的 Tuple 項目值。Gets the value of the specified Tuple element.

ITuple.Length

取得 Tuple 中的項目數目。Gets the number of elements in the Tuple.

擴充方法

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

將具有 3 個元素的元組解構為不同的變數。Deconstructs a tuple with 3 elements into separate variables.

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

Tuple 類別的執行個體轉換為 ValueTuple 結構的執行個體。Converts an instance of the Tuple class to an instance of the ValueTuple structure.

適用於

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