Thanks Nello, Paul & Max. I can see that I will have to move the elements
individually, especially if the object contains other object pointers like
dynamic arrays. Which leads to another question. What is the best way to
clone a dynamic array with 1000's of items? Is there a way to copy the
memory contents at the pointers location.
Cheers,
Ross.
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
> Behalf Of Nello Sestini
> Sent: Wednesday, 15 August 2001 10:24
> To: Multiple recipients of list delphi
> Subject: Re: [DUG]: Duplicate an Object & Data
>
>
> The "Delphi Way" of copying objects in an OOP fashion is
> often to use the AssignTo method.
>
> Most of the the VCL objects will have virtual AssignTo methods
> already - and they will allow you to assign the value of one
> object to another.
>
> mySourceObject.AssignTo( myTargetObject);
>
> This is NOT the same as pointing to the same object - you
> construct an "empty" myTargetObject (or use one you already
> have handy) and then this method copies stuff from mySourceObject.
>
> When you derive your own object from a base that already has
> an AssignTo method you should override it. That new virtual
> AssignTo usually calls the base class AssignTo to copy the
> inherited properties and then explicitly handles copying
> stuff specific to the derived class itself.
>
> AssignTo is (sort of) the Delphi way of doing what C++ calls
> a "copy constructor". (An important difference is that they
> don't get called automatically when you pass objects by value).
>
> hope this is useful
>
> -ns
>
>
>
>
>
> ----- Original Message -----
> From: "Ross Levis" <[EMAIL PROTECTED]>
> To: "Multiple recipients of list delphi" <[EMAIL PROTECTED]>
> Sent: Wednesday, August 15, 2001 4:20 AM
> Subject: [DUG]: Duplicate an Object & Data
>
>
> > Is it possible to duplicate a static object with it's
> contents. I don't
> > want 2 pointers to the same object.
> >
> > Say I have an object defined like this:
> >
> > type TTest = class
> > TestName: String;
> > TestArray: Array of Real;
> > TestList: TStringList;
> > end;
> >
> > var Test,Test2: TTest;
> >
> > Later a TTest is created and assigned to Test and data
> allocated to the
> > fields. Is there a simple way of duplicating the data and
> assigning it to
> > Test2 without having to copy each field separately?
> >
> > Cheers,
> > Ross.
> >
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