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Re: Copying IDL objects [message #13048 is a reply to message #12981]

Fri, 02 October 1998 00:00

J.D. Smith
Messages: 214
Registered: August 1996

Senior Member

Mark Rivers wrote:
>
> I am trying to figure out how to make a copy of an instance of an IDL object.
>
> a = obj_new('myobj')
> b = a
> ; This does not do what I want, it makes a new reference to the same instance
>
> b = obj_copy(a) ; This is what I want
>
> The only way I can see how to do it is:
>
> pro my_obj::copy, out
> out->set_a, self.a
> out->set_b, self.b
> ....
> end
>
> This means I have to write a set_X function for each field, and each object
> class needs its own version of the ::copy routine. This seems crazy.
>
> I seem to recall a post from a few months ago about some ways of generally
> getting/setting properties in IDL objects. Any ideas?
>

Here's something really dirty that will do the trick. Use it if
desperate:

function obj_copy, obj
o=obj
file=filepath('obj.sav',/TMP)
save,o,FILENAME=file
restore, FILENAME=file
return,o
end

Does the job though. If you're really doing a lot of this, consider
setting up a small ram disk just for this purpose.

JD

--
J.D. Smith |*| WORK: (607) 255-5842
Cornell University Dept. of Astronomy |*| (607) 255-6263
304 Space Sciences Bldg. |*| FAX: (607) 255-5875
Ithaca, NY 14853 |*|

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[Message index]

		Copying IDL objects By: rivers on Wed, 30 September 1998 00:00
		Re: Copying IDL objects By: J.D. Smith on Fri, 02 October 1998 00:00
		Re: Copying IDL objects By: davidf on Fri, 02 October 1998 00:00
		Re: Copying IDL objects By: davidf on Fri, 02 October 1998 00:00

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