Tuple<T1,T2,T3,T4> Class (System) (original) (raw)

Reference

Definition

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

generic <typename T1, typename T2, typename T3, typename T4>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable, System::Runtime::CompilerServices::ITuple

public class Tuple<T1,T2,T3,T4> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable

public class Tuple<T1,T2,T3,T4> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable, System.Runtime.CompilerServices.ITuple

[System.Serializable]
public class Tuple<T1,T2,T3,T4> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable

type Tuple<'T1, 'T2, 'T3, 'T4> = class
    interface IStructuralComparable
    interface IStructuralEquatable
    interface IComparable

type Tuple<'T1, 'T2, 'T3, 'T4> = class
    interface IStructuralComparable
    interface IStructuralEquatable
    interface IComparable
    interface ITuple

[<System.Serializable>]
type Tuple<'T1, 'T2, 'T3, 'T4> = class
    interface IStructuralEquatable
    interface IStructuralComparable
    interface IComparable

[<System.Serializable>]
type Tuple<'T1, 'T2, 'T3, 'T4> = class
    interface IStructuralEquatable
    interface IStructuralComparable
    interface IComparable
    interface ITuple

Public Class Tuple(Of T1, T2, T3, T4)
Implements IComparable, IStructuralComparable, IStructuralEquatable

Public Class Tuple(Of T1, T2, T3, T4)
Implements IComparable, IStructuralComparable, IStructuralEquatable, ITuple

Type Parameters

The type of the tuple's first component.

The type of the tuple's second component.

The type of the tuple's third component.

The type of the tuple's fourth component.

Inheritance

Attributes

Implements

A tuple is a data structure that has a specific number and sequence of values. The Tuple<T1,T2,T3,T4> class represents a 4-tuple, or quadruple, which is a tuple that has four components.

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. You can retrieve the value of the tuple's components by using the read-only Item1, Item2, Item3, and Item4 instance properties.

Tuples are commonly used in four different ways:

To represent a single set of data. For example, a tuple can represent a database record, and its components can represent individual fields of the record.
To provide easy access to, and manipulation of, a data set. 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. 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. 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

open System  
let computeStatistics (pitchers: Tuple<string, decimal, int, int>[]) =  
    [| for pitcher in pitchers do  
        // Decimal portion of innings pitched represents 1/3 of an inning  
        let innings =  truncate (double pitcher.Item2) |> double  
        let innings = innings + (double pitcher.Item2 - innings) * 0.33  
          
        let ERA = double pitcher.Item4 / innings * 9.  
        let hitsPerInning = double pitcher.Item3 / innings  
        let EI = (ERA * 2. + hitsPerInning * 9.) / 3.  
        Tuple<string, double, double, double>(pitcher.Item1, ERA, hitsPerInning, EI)|]  
let 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) |]  
let results = computeStatistics pitchers  
// Display the results.  
printfn "%-20s %9s %11s %15s\n" "Pitcher" "ERA" "Hits/Inn." "Effectiveness"  
for result in results do  
    printfn $"{result.Item1,-20} {result.Item2,9:F2} {result.Item3,11:F2} {result.Item4,15:F2}"  
// 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

To return multiple values from a method without the use of out parameters (in C#) or ByRef parameters (in Visual Basic). 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.
To pass multiple values to a method through a single parameter. 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. 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.

Constructors

Properties

Item1	Gets the value of the current Tuple<T1,T2,T3,T4> object's first component.
Item2	Gets the value of the current Tuple<T1,T2,T3,T4> object's second component.
Item3	Gets the value of the current Tuple<T1,T2,T3,T4> object's third component.
Item4	Gets the value of the current Tuple<T1,T2,T3,T4> object's fourth component.

Methods

Explicit Interface Implementations

IComparable.CompareTo(Object)	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)	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)	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)	Calculates the hash code for the current Tuple<T1,T2,T3,T4> object by using a specified computation method.
ITuple.Item[Int32]	Gets the value of the specified Tuple element.
ITuple.Length	Gets the number of elements in the Tuple.

Extension Methods

Deconstruct<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>, T1, T2, T3, T4)	Deconstructs a tuple with 4 elements into separate variables.
ToValueTuple<T1,T2,T3,T4>(Tuple<T1,T2,T3,T4>)	Converts an instance of the Tuple class to an instance of the ValueTuple structure.