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Re: structure access using strings for tag-names [message #43478 is a reply to message #43427]

Wed, 13 April 2005 02:29

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

Thomas Pfaff wrote:
> Hello everyone,
>
> I would like to ask your opinion about the following.
>
> Using the function CREATE_STRUCT it is possible to create a struct with
> tag names defined by strings. This way it is possible to create structs
> without knowing their names at compile time.
>
> However even if I don't have to know the tag names when creating a
> struct, it seems that I still have to know them, when I want to acccess
> the data within that struct, because I couldn't find any procedure or
> function for this purpose and struct.'tag_name' quite naturally gives a
> syntax error.
>
> Any ideas why this isn't implemented, or why it isn't necessary to have
> it (would be nice to set up simple associative containers, wouldn't it)?
>
> Best regards,
>
>
> Thomas

You could use the routine tag_position from our library.

test=create_struct('A',1,'B',2)
print, test.(tag_position(test,'A'))

http://www.fz-juelich.de/icg/icg-i/idl_icglib/idl_source/idl _html/dbase/tag_position_dbase.pro.html

cheers
Reimar

--
Reimar Bauer

Institut fuer Stratosphaerische Chemie (ICG-I)
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
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a IDL library at ForschungsZentrum Juelich
http://www.fz-juelich.de/icg/icg-i/idl_icglib/idl_lib_intro. html
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[Message index]

		structure access using strings for tag-names By: Thomas Pfaff on Mon, 11 April 2005 05:08
		Re: structure access using strings for tag-names By: Paolo Grigis on Mon, 11 April 2005 05:31
		Re: structure access using strings for tag-names By: Antonio Santiago on Mon, 11 April 2005 05:15
		Re: structure access using strings for tag-names By: R.Bauer on Wed, 13 April 2005 02:29

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