ValueType.Equals Method (Object)
.NET Framework 3.0
Indicates whether this instance and a specified object are equal.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
The following example demonstrates how the Equals method can be overridden by a derived value type.
public ref struct Complex { public: double m_Re; double m_Im; virtual bool Equals( Object^ ob ) override { if ( dynamic_cast<Complex^>(ob) ) { Complex^ c = dynamic_cast<Complex^>(ob); return m_Re == c->m_Re && m_Im == c->m_Im; } else { return false; } } virtual int GetHashCode() override { return m_Re.GetHashCode() ^ m_Im.GetHashCode(); } };
public class Complex
{
public double mRe;
public double mIm;
public boolean Equals(Object ob)
{
if (ob instanceof Complex) {
Complex c = (Complex)ob;
return mRe == c.mRe && mIm == c.mIm;
}
else {
return false;
}
} //Equals
public int GetHashCode()
{
return ((System.Double)mRe).GetHashCode() ^ ((System.Double)mIm).
GetHashCode();
} //GetHashCode
} //Complex
public class Complex { public var m_Re : double; public var m_Im : double; public override function Equals( ob ) : Boolean{ if( ob.GetType() == Complex ) { var c : Complex = Complex(ob); return m_Re==c.m_Re && m_Im==c.m_Im; } else { return false; } } public override function GetHashCode() : int{ return m_Re.GetHashCode() ^ m_Im.GetHashCode(); } public static function main() { var x : Complex = new Complex(); x.m_Re = 1; x.m_Im = 2; var y : Complex = new Complex(); y.m_Re = 2; y.m_Im = 1; Console.Write(x.Equals(y)); } }
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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