Hi Toshi,
the Root3 definition of TObject::IsEqual is
virtual Bool_t IsEqual(const TObject* obj) const
(see http://root.cern.ch/root/html/TObject.html). As you didn't give the
const specifiers your IsEqual doesn't get called as it does not replace the
TObject::IsEqual. This "const" change was introduced in Vers 3, so for 2.xx
your method works.
Cheers, Axel.
> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
> [mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Toshinori Abe
> Sent: Monday, February 19, 2001 12:28 PM
> To: roottalk@pcroot.cern.ch
> Subject: [ROOT] question about TMap.FindObject
>
>
> Dear Rooters,
>
> I have a question about TMap.
> When I try to run the attached file, I got different answers
> using root version 2.25/03 and 3.00/05.
>
> with Version 2.25/03
> fa=0x3cdb98 a=0x3cdb48 amc=0x3bf500 val=0x3bf500
> fb=0x3cdb98 b=0x3cdb70 bmc=0x3bf520 val=0x3bf500
>
> with Version 3.00/05
> fa=4d4520 a=4d1e38 amc=4d1e50 val=4d1e50
> fb=4d4540 b=4d1e68 bmc=4d1e80 val=4d1e80
>
> I thought two outputs of "val" would be same.
> It looks that "MyObject.IsEqual" does not work in "TMap" for root 3.00/05.
> Would you suggest me if any idea?
>
> Thanks very much in advance, - Toshi
>
>
> Name : Toshinori Abe
> Add. : SLAC M/S 96, 2575 SandHill Road, Menlo Park, CA 94025, USA
> E-mail : toshi@SLAC.Stanford.EDU
> ----------------------------------------------------------------------
>
>
> #include <iostream.h>
>
> #include "TROOT.h"
> #include "TMap.h"
> #include "TMath.h"
> #include "TObject.h"
>
> class MyObject : public TObject {
> private:
> Int_t m_ID;
> public:
> MyObject(Int_t ID) {m_ID=ID;}
> MyObject() {m_ID=0;}
> ~MyObject(){}
> Int_t GetID() {return m_ID;}
> ULong_t Hash(){ return m_ID;}
> Bool_t IsEqual(TObject *obj){ return m_ID == ((MyObject*)obj)->GetID();}
> };
>
> TMap *MyList = new TMap( 17, 0 );
>
> int main (int argc,char* argv[]) {
>
> TROOT simple( "Test", "MyObject test" );
>
> MyObject* a=new MyObject(1); TObject* amc=new TObject();
> MyObject* b=new MyObject(1); TObject* bmc=new TObject();
> MyList->Add(a,amc);
> MyList->Add(b,bmc);
>
> cout<<"fa="<<MyList->FindObject(a)<<" a="<<a<<" amc="<<amc<<
> " val="<<MyList->GetValue(a)<<endl;
> cout<<"fb="<<MyList->FindObject(b)<<" b="<<b<<" bmc="<<bmc<<
> " val="<<MyList->GetValue(b)<<endl;
>
> return 0;
> }
>
>
>
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