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indexing a structure in a list [message #87472]

Wed, 05 February 2014 08:36

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

Hi,
I've got the feeling this should work, but for some reason it isn't.
So here is some code to test the problem with the errors describe in it:

PRO testStrutRef
Compile_Opt idl2
a = list(findgen(10), /extract)
a[4] = {value:3.0}
help, a[4], /struct
;a[4].value = 4.0 ;won't work: % Attempt to store into an expression: Structure reference.
;(a[4]).value = 4.0 ;won't work: % Attempt to store into an expression: Structure reference.
;((a)[4]).value = 4.0 ;won't work: % Attempt to store into an expression: Structure reference.
struct = a[4]
struct.value = 4.0
a[4] = struct ;works, but not really straight forward...
print, a
END

It seems like I can't address a structure element of a list directly.
Did I misplace my parenthesis? Is there a less cumbersome workaround?

Thanks,
Helder

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[Message index]

		indexing a structure in a list By: Helder Marchetto on Wed, 05 February 2014 08:36
		Re: indexing a structure in a list By: David Fanning on Wed, 05 February 2014 09:00
		Re: indexing a structure in a list By: Craig Markwardt on Wed, 05 February 2014 09:52
		Re: indexing a structure in a list By: Michael Galloy on Wed, 05 February 2014 10:05
		Re: indexing a structure in a list By: Helder Marchetto on Wed, 05 February 2014 11:42

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