# Tuple<T1,T2,T3,T4,T5>.IStructuralEquatable.Equals(Object, IEqualityComparer)Tuple<T1,T2,T3,T4,T5>.IStructuralEquatable.Equals(Object, IEqualityComparer)Tuple<T1,T2,T3,T4,T5>.IStructuralEquatable.Equals(Object, IEqualityComparer) Method

## 定義

`` virtual bool System.Collections.IStructuralEquatable.Equals(System::Object ^ other, System::Collections::IEqualityComparer ^ comparer) = System::Collections::IStructuralEquatable::Equals;``
``bool IStructuralEquatable.Equals (object other, System.Collections.IEqualityComparer comparer);``
``Function Equals (other As Object, comparer As IEqualityComparer) As Boolean Implements IStructuralEquatable.Equals``

#### パラメーター

other
Object Object Object

このインスタンスと比較するオブジェクト。The object to compare with this instance.

comparer
IEqualityComparer IEqualityComparer IEqualityComparer

2 つのオブジェクトが等しいかどうかの評価に使用するメソッドを定義するオブジェクト。An object that defines the method to use to evaluate whether the two objects are equal.

## 例

``````using System;
using System.Collections;

public class DoubleComparer<T1, T2, T3, T4, T5> : IEqualityComparer
{
private double difference;
private int argument = 0;

public DoubleComparer(double difference)
{
this.difference = difference;
}

new public bool Equals(object x, object y)
{
argument += 1;

// Return true for Item1.
if (argument == 1) return true;

double d1 = (double) x;
double d2 = (double) y;

if (d1 - d2 < d1 * difference)
return true;
else
return false;
}

public int GetHashCode(object obj)
{
if (obj is T1)
return ((T1) obj).GetHashCode();
else if (obj is T2)
return ((T2) obj).GetHashCode();
else if (obj is T3)
return ((T3) obj).GetHashCode();
else if (obj is T4)
return ((T4) obj).GetHashCode();
else
return ((T5) obj).GetHashCode();
}
}

public class Example
{
public static void Main()
{
var value1 = GetValues(1);
var value2 = GetValues(2);
IStructuralEquatable iValue1 = value1;
Console.WriteLine("{0} =\n{1} :\n{2}", value1, value2,
iValue1.Equals(value2,
new DoubleComparer<int, double, double, double, double>(.01)));
}

private static Tuple<int, double, double, double, double> GetValues(int ctr)
{
// Generate four random numbers between 0 and 1
Random rnd = new Random((int)DateTime.Now.Ticks >> 32 >> ctr);
return Tuple.Create(ctr, rnd.NextDouble(), rnd.NextDouble(),
rnd.NextDouble(), rnd.NextDouble());
}
}
``````
``````Imports System.Collections

Public Class DoubleComparer(Of T1, T2, T3, T4, T5) : Implements IEqualityComparer
Private difference As Double
Private argument As Integer = 0

Public Sub New(difference As Double)
Me.difference = difference
End Sub

Public Overloads Function Equals(x As Object, y As Object) As Boolean _
Implements IEqualityComparer.Equals
argument += 1

' Return true for Item1.
If argument = 1 Then
Return True
Else
Dim d1 As Double = CDbl(x)
Dim d2 As Double = CDbl(y)
If d1 - d2 < d1 * difference Then
Return True
Else
Return False
End If
End If
End Function

Public Overloads Function GetHashCode(obj As Object) As Integer _
Implements IEqualityComparer.GetHashCode
If TypeOf obj Is T1 Then
Return CType(obj, T1).GetHashCode()
ElseIf TypeOf obj Is T2 Then
Return CType(obj, T2).GetHashCode()
ElseIf TypeOf obj Is T3 Then
Return CType(Obj, T3).GetHashCode()
ElseIf TypeOf obj Is T4 Then
Return CType(Obj, T4).GetHashCode()
Else
Return CType(obj, T5).GetHashCode()
End If
End Function
End Class

Module Example
Public Sub Main()
Dim value1 = GetValues(1)
Dim value2 = GetValues(2)
Dim iValue1 As IStructuralEquatable = value1
Console.WriteLine("{0} ={3}{1} :{3}{2}", value1, value2, _
iValue1.Equals(value2, _
New DoubleComparer(Of Integer, Double, Double, Double, Double)(.01)), _
vbCrLf)
End Sub

Private Function GetValues(ctr As Integer) As Tuple(Of Integer, Double, Double, Double, Double)
' Generate four random numbers between 0 and 1
Dim rnd As New Random(CInt((DateTime.Now.Ticks >> 32) >> ctr))
Return Tuple.Create(ctr, rnd.NextDouble(), rnd.NextDouble(),
rnd.NextDouble(), rnd.NextDouble)
End Function
End Module
' The example displays output like the following:
'    (1, 0.910850029862882, 0.894596965934428, 0.319678635019659, 0.801647342649124) =
'    (2, 0.818546649915421, 0.355961162762698, 0.0438506622071614, 0.679904267042831) :
'    False
``````

## 注釈

このメンバーは、明示的なインターフェイス メンバーの実装です。This member is an explicit interface member implementation. これは、Tuple<T1,T2,T3,T4,T5> のインスタンスが IStructuralEquatable インターフェイスにキャストされる場合のみ、使用できます。It can be used only when the Tuple<T1,T2,T3,T4,T5> instance is cast to an IStructuralEquatable interface.

IEqualityComparer.Equals場合にのみ実装が呼び出されます`other`ない`null`、正常にすることができるかどうか、キャスト (C#) または変換 (Visual Basic) で、Tuple<T1,T2,T3,T4,T5>コンポーネントが現在のインスタンスと同じ型のオブジェクト。The IEqualityComparer.Equals implementation is called only if `other` is not `null`, and if it can be successfully cast (in C#) or converted (in Visual Basic) to a Tuple<T1,T2,T3,T4,T5> object whose components are of the same types as the current instance. IStructuralEquatable.Equals(Object, IEqualityComparer)メソッドの最初のパス、Item1の値、Tuple<T1,T2,T3,T4,T5>と比較するオブジェクト、IEqualityComparer.Equals実装します。The IStructuralEquatable.Equals(Object, IEqualityComparer) method first passes the Item1 values of the Tuple<T1,T2,T3,T4,T5> objects to be compared to the IEqualityComparer.Equals implementation. このメソッドの呼び出しが返された場合`true`、メソッドが再度呼び出され、渡された、 Item2 、2 つの値Tuple<T1,T2,T3,T4,T5>オブジェクト。If this method call returns `true`, the method is called again and passed the Item2 values of the two Tuple<T1,T2,T3,T4,T5> objects. これは、メソッドの呼び出しから制御されるまで続行`false`の特定のペアを比較すると`Item`値、または 2 つItem5値は、メソッドに渡されます。This continues until the method call returns `false` when it compares a specific pair of `Item` values, or the two Item5 values are passed to the method.