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Re: Q: Array of Structures [message #12054 is a reply to message #12052]

Fri, 12 June 1998 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Saeid.Zoonematkermani@sunysb.edu writes:

> Thanks for the response. I think there is more to this problem than is
> apparent at first. I believe that my structures are created identically.
> It is the output of a complicated procedure. The structure is defined
> inside the procedure and they should be the same each time. And just to
> check this, I ran your example from above and here is the result:
>
> IDL> a = { data:FltArr(10), name:'First Structure' }
> IDL> b = { data:FltArr(10), name:'Second Structure' }
> IDL> c = [a, b]
> % Conflicting data structures: B,concatenation.
> % Execution halted at: $MAIN$
>
> Rather curious. I wonder if this is a MacOS version problem!

Oh, oh. Another one of those days. I *tested* this. I have the
file to prove it! But you are right, I can't reproduce it. :-(

I guess string lengths in structures have to be exactly the
same, too. Which surprises me and goes contrary to what happens,
for example, when you replicate named structures with the
REPLICATE command.

But, look. I just tried this:

a = { data:FltArr(10), name:'' }
b = { data:FltArr(10), name:'' }
c = [a, b]
% Conflicting data structures: B,concatenation.
% Execution halted at: $MAIN$

But now, I try this:

a = { data:FltArr(10), name:'' }
b = a
c = [a, b]

No problem!

Very, very weird. I'll see if RSI can explain this. :-)

Cheers,

David

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[Message index]

		Re: Q: Array of Structures By: Vap User on Wed, 17 June 1998 00:00
		Re: Q: Array of Structures By: korpela on Sun, 14 June 1998 00:00
		Re: Q: Array of Structures By: J.D. Smith on Fri, 12 June 1998 00:00
		Re: Q: Array of Structures By: davidf on Fri, 12 June 1998 00:00
		Re: Q: Array of Structures By: Saeid.Zoonematkermani on Fri, 12 June 1998 00:00
		Re: Q: Array of Structures By: davidf on Fri, 12 June 1998 00:00

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