Tuple<T1,T2> Class
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Represents a 2-tuple, or pair.
generic <typename T1, typename T2>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable
generic <typename T1, typename T2>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable, System::Runtime::CompilerServices::ITuple
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable, System.Runtime.CompilerServices.ITuple
[System.Serializable]
public class Tuple<T1,T2> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable
type Tuple<'T1, 'T2> = class
interface IStructuralComparable
interface IStructuralEquatable
interface IComparable
type Tuple<'T1, 'T2> = class
interface IStructuralComparable
interface IStructuralEquatable
interface IComparable
interface ITuple
[<System.Serializable>]
type Tuple<'T1, 'T2> = class
interface IStructuralEquatable
interface IStructuralComparable
interface IComparable
[<System.Serializable>]
type Tuple<'T1, 'T2> = class
interface IStructuralEquatable
interface IStructuralComparable
interface IComparable
interface ITuple
Public Class Tuple(Of T1, T2)
Implements IComparable, IStructuralComparable, IStructuralEquatable
Public Class Tuple(Of T1, T2)
Implements IComparable, IStructuralComparable, IStructuralEquatable, ITuple
- T1
The type of the tuple's first component.
- T2
The type of the tuple's second component.
- Inheritance
-
Tuple<T1,T2>
- Attributes
- Implements
A tuple is a data structure that has a specific number and sequence of values. The Tuple<T1,T2> class represents a 2-tuple, or pair, which is a tuple that has two components. A 2-tuple is similar to a KeyValuePair<TKey,TValue> structure.
You can instantiate a Tuple<T1,T2> object by calling either the Tuple<T1,T2> constructor or the static Tuple.Create<T1,T2>(T1, T2) method. You can retrieve the values of the tuple's components by using the read-only Item1 and Item2 instance properties.
Tuples are commonly used in four different ways:
To represent a single set of data. For example, a tuple can represent a record in a database, and its components can represent that record's fields.
To provide easy access to, and manipulation of, a data set. The following example defines an array of Tuple<T1,T2> objects that contain the names of students and their corresponding test scores. It then iterates the array to calculate the mean test score.
using System; public class Example { public static void Main() { Tuple<string, Nullable<int>>[] scores = { new Tuple<string, Nullable<int>>("Jack", 78), new Tuple<string, Nullable<int>>("Abbey", 92), new Tuple<string, Nullable<int>>("Dave", 88), new Tuple<string, Nullable<int>>("Sam", 91), new Tuple<string, Nullable<int>>("Ed", null), new Tuple<string, Nullable<int>>("Penelope", 82), new Tuple<string, Nullable<int>>("Linda", 99), new Tuple<string, Nullable<int>>("Judith", 84) }; int number; double mean = ComputeMean(scores, out number); Console.WriteLine("Average test score: {0:N2} (n={1})", mean, number); } private static double ComputeMean(Tuple<string, Nullable<int>>[] scores, out int n) { n = 0; int sum = 0; foreach (var score in scores) { if (score.Item2.HasValue) { n += 1; sum += score.Item2.Value; } } if (n > 0) return sum / (double) n; else return 0; } } // The example displays the following output: // Average test score: 87.71 (n=7)
open System let scores = [| Tuple<string, Nullable<int>>("Jack", 78) Tuple<string, Nullable<int>>("Abbey", 92) Tuple<string, Nullable<int>>("Dave", 88) Tuple<string, Nullable<int>>("Sam", 91) Tuple<string, Nullable<int>>("Ed", Nullable()) Tuple<string, Nullable<int>>("Penelope", 82) Tuple<string, Nullable<int>>("Linda", 99) Tuple<string, Nullable<int>>("Judith", 84) |] let computeMean (scores: Tuple<string, Nullable<int>>[]) (n: int outref) = n <- 0 let mutable sum = 0 for _, score in scores do if score.HasValue then n <- n + 1 sum <- sum + score.Value if n > 0 then double sum / double n else 0 let mutable number = 0 let mean = computeMean scores &number printfn $"Average test score: {mean:N2} (n={number})" // The example displays the following output: // Average test score: 87.71 (n=7)
Module Example Public Sub Main() Dim scores() As Tuple(Of String, Nullable(Of Integer)) = { New Tuple(Of String, Nullable(Of Integer))("Jack", 78), New Tuple(Of String, Nullable(Of Integer))("Abbey", 92), New Tuple(Of String, Nullable(Of Integer))("Dave", 88), New Tuple(Of String, Nullable(Of Integer))("Sam", 91), New Tuple(Of String, Nullable(Of Integer))("Ed", Nothing), New Tuple(Of String, Nullable(Of Integer))("Penelope", 82), New Tuple(Of String, Nullable(Of Integer))("Linda", 99), New Tuple(Of String, Nullable(Of Integer))("Judith", 84) } Dim number As Integer Dim mean As Double = ComputeMean(scores, number) Console.WriteLine("Average test score: {0:N2} (n={1})", mean, number) End Sub Private Function ComputeMean(scores() As Tuple(Of String, Nullable(Of Integer)), ByRef n As Integer) As Double n = 0 Dim sum As Integer For Each score In scores If score.Item2.HasValue Then n += 1 sum += score.Item2.Value End If Next If n > 0 Then Return sum / n Else Return 0 End If End Function End Module ' The example displays the following output: ' Average test score: 87.71 (n=7)
To return multiple values from a method without the use of
out
parameters (in C#) orByRef
parameters (in Visual Basic). For example, the following example uses a Tuple<T1,T2> object to return the quotient and the remainder that result from integer division.using System; public class Class1 { public static void Main() { int dividend, divisor; Tuple<int, int> result; dividend = 136945; divisor = 178; result = IntegerDivide(dividend, divisor); if (result != null) Console.WriteLine(@"{0} \ {1} = {2}, remainder {3}", dividend, divisor, result.Item1, result.Item2); else Console.WriteLine(@"{0} \ {1} = <Error>", dividend, divisor); dividend = Int32.MaxValue; divisor = -2073; result = IntegerDivide(dividend, divisor); if (result != null) Console.WriteLine(@"{0} \ {1} = {2}, remainder {3}", dividend, divisor, result.Item1, result.Item2); else Console.WriteLine(@"{0} \ {1} = <Error>", dividend, divisor); } private static Tuple<int, int> IntegerDivide(int dividend, int divisor) { try { int remainder; int quotient = Math.DivRem(dividend, divisor, out remainder); return new Tuple<int, int>(quotient, remainder); } catch (DivideByZeroException) { return null; } } } // The example displays the following output: // 136945 \ 178 = 769, remainder 63 // 2147483647 \ -2073 = -1035930, remainder 757
open System let integerDivide (dividend: int) divisor = try let quotient, remainder = Math.DivRem(dividend, divisor) Tuple<int, int>(quotient, remainder) with :? DivideByZeroException -> Unchecked.defaultof<Tuple<int, int>> [<EntryPoint>] let main _ = let dividend = 136945 let divisor = 178 let result = integerDivide dividend divisor if box result <> null then printfn $@"{dividend} \ {divisor} = {result.Item1}, remainder {result.Item2}" else printfn $@"{dividend} \ {divisor} = <Error>" let dividend = Int32.MaxValue let divisor = -2073 let result = integerDivide dividend divisor if box result <> null then printfn $@"{dividend} \ {divisor} = {result.Item1}, remainder {result.Item2}" else printfn $@"{dividend} \ {divisor} = <Error>" 0 // The example displays the following output: // 136945 \ 178 = 769, remainder 63 // 2147483647 \ -2073 = -1035930, remainder 757
Module modMain Public Sub Main() Dim dividend, divisor As Integer Dim result As Tuple(Of Integer, Integer) dividend = 136945 : divisor = 178 result = IntegerDivide(dividend, divisor) If result IsNot Nothing Then Console.WriteLine("{0} \ {1} = {2}, remainder {3}", dividend, divisor, result.Item1, result.Item2) Else Console.WriteLine("{0} \ {1} = <Error>", dividend, divisor) End If dividend = Int32.MaxValue : divisor = -2073 result = IntegerDivide(dividend, divisor) If result IsNot Nothing Then Console.WriteLine("{0} \ {1} = {2}, remainder {3}", dividend, divisor, result.Item1, result.Item2) Else Console.WriteLine("{0} \ {1} = <Error>", dividend, divisor) End If End Sub Private Function IntegerDivide(dividend As Integer, divisor As Integer) As Tuple(Of Integer, Integer) Try Dim remainder As Integer Dim quotient As Integer = Math.DivRem(dividend, divisor, remainder) Return New Tuple(Of Integer, Integer)(quotient, remainder) Catch e As DivideByZeroException Return Nothing End Try End Function End Module ' The example displays the following output: ' 136945 \ 178 = 769, remainder 63 ' 2147483647 \ -2073 = -1035930, remainder 757
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> object as the method argument, you can supply the thread's startup routine with two items of data.
Tuple<T1,T2>(T1, T2) |
Initializes a new instance of the Tuple<T1,T2> class. |
Item1 |
Gets the value of the current Tuple<T1,T2> object's first component. |
Item2 |
Gets the value of the current Tuple<T1,T2> object's second component. |
Equals(Object) |
Returns a value that indicates whether the current Tuple<T1,T2> object is equal to a specified object. |
Get |
Returns the hash code for the current Tuple<T1,T2> object. |
Get |
Gets the Type of the current instance. (Inherited from Object) |
Memberwise |
Creates a shallow copy of the current Object. (Inherited from Object) |
To |
Returns a string that represents the value of this Tuple<T1,T2> instance. |
IComparable. |
Compares the current Tuple<T1,T2> 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. |
IStructural |
Compares the current Tuple<T1,T2> 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. |
IStructural |
Returns a value that indicates whether the current Tuple<T1,T2> object is equal to a specified object based on a specified comparison method. |
IStructural |
Calculates the hash code for the current Tuple<T1,T2> object by using a specified computation method. |
ITuple. |
Gets the value of the specified |
ITuple. |
Gets the number of elements in the |
Deconstruct<T1,T2>(Tuple<T1,T2>, T1, T2) |
Deconstructs a tuple with 2 elements into separate variables. |
To |
Converts an instance of the |
Produkt | Versionen |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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