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Re: calling a structure tag as a variable? [message #79441 is a reply to message #79440] Mon, 27 February 2012 08:55 Go to previous messageGo to previous message
Lajos Foldy is currently offline  Lajos Foldy
Messages: 176
Registered: December 2011
Senior Member
On Feb 27, 5:36 pm, desertdryad <dry...@gmail.com> wrote:
> Hi folks -
>
> I have a set of structure variables I use in a suite of programs.  I
> need to run the same procedure on several different fields within that
> structure; where the only difference in how th eprocedure is used is
> the particualr field it operates on.  But I don't want to do them 'all
> at once' either.  I would like to be able to call the procedure in
> question by somehow making the tag name to operate on in the procedure
> a variable.  But I don't think there is a way to do that in IDL?
>
> (did I explain my question understandably?)

You can access structure fields by tag numbers, too:

IDL> s={s, i:0, l:0l, f:0.0}
IDL> tagnum=1
IDL> help, s.(tagnum)
<Expression> LONG = 0

regards,
Lajos
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