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Method_valid [message #40507]

Mon, 16 August 2004 11:21

Andrew Meigs
Messages: 8
Registered: November 2000

Junior Member

Is there a way efficiently check if an object has a method? I vaguely
remember this topic coming up in the newsgroup before but my googling has
not been fruitful.

I can of course use the following code to check the existence of a 'copy'
method (a general function is not hard at all as well):

FUNCTION copyCheck, objToCheck
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /Cancel
RETURN, 0
ENDIF
c = objToCheck -> copy() ;; if ok then goes to next line, if not then
goes to the catch error code
obj_destroy, c ;; don't really want to copy if it's valid. -- 16-08-2004
AGM -- may be inefficient for large objects (surely there's an
method_valid???)
return, 1

END

However, as my code comments suggest if the method actually executes then
there could be large overhead.

Thanks,

Andy

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[Message index]

		Method_valid By: Andrew Meigs on Mon, 16 August 2004 11:21
		Re: Method_valid By: David Fanning on Wed, 18 August 2004 06:41
		Re: Method_valid By: btt on Wed, 18 August 2004 06:26
		Re: Method_valid By: Andrew Meigs on Wed, 18 August 2004 05:56
		Re: Method_valid By: Andrew Meigs on Wed, 18 August 2004 02:15
		Re: Method_valid By: David Fanning on Tue, 17 August 2004 06:27
		Re: Method_valid By: David Fanning on Tue, 17 August 2004 06:23
		Re: Method_valid By: btt on Tue, 17 August 2004 05:41
		Re: Method_valid By: David Fanning on Mon, 16 August 2004 21:35

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