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Re: Copying (Duplicating) Objects [message #31026 is a reply to message #31025]

Thu, 06 June 2002 02:56

Randall Skelton
Messages: 169
Registered: October 2000

Senior Member

On Thu, 6 Jun 2002, Ben Tupper wrote:

>>
>>> What's the command to make b an entirely new object but identical to
>>> a.
> Hello,
>
> In Martin Schultz's MGS_BASEOBJECT there is a COPY method that returns
> a populated object of the same class as the original; the returned new
> object has its own reference id. It's pretty handy for most object
> coding I deal with. It's worth a peek.

I agree with Ben... I too use Martin's copy method and it works very well.
It does have problems when you try and clone a class that has requried
positional parameters though as internally it relies on 'clone = obj_new(
obj_class(self) )'. My 'I do not have time to think about this now'
solution was to make classes with no required positional parameters and
write an 'isValid' method that ensures the object is correctly populated
with 'quasi-required' parameters before it is used. Of course, failing to
use positional arguments for required parameters goes against some well
established IDL programming conventions and therefore tends to upset some
of the IDL Expert Programmer's Association Executive Committee members ;)

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[Message index]

		Re: Copying (Duplicating) Objects By: Mark Hadfield on Thu, 06 June 2002 14:38
		Re: Copying (Duplicating) Objects By: Paul Van Delst[1] on Thu, 06 June 2002 06:44
		Re: Copying (Duplicating) Objects By: Randall Skelton on Thu, 06 June 2002 02:56
		Re: Copying (Duplicating) Objects By: btupper on Wed, 05 June 2002 18:08
		Re: Copying (Duplicating) Objects By: Mark Hadfield on Wed, 05 June 2002 14:40
		Re: Copying (Duplicating) Objects By: MKatz843 on Sat, 08 June 2002 11:49

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