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Re: quirk End of file encountered before end of program [message #89884 is a reply to message #89876]

Wed, 17 December 2014 02:28

LC's No-Spam Newsread[1] is currently offline

LC's No-Spam Newsread[1]
Messages: 8
Registered: June 2008

Junior Member

On Mon, 15 Dec 2014, Yngvar Larsen wrote:

> ! LC's No-Spam Newsreading account wrote:
>>
>> The original code I had (dating to several years ago, before anonymous
>> structures were introduced) used in fact a much more complex mechanism.
>
> Wow. Are you sure? Both named and anonymous structures have been there
> at least since IDL 4.0 (maybe even from the very beginning?), released
> several _decades_ ago.

Actually the original scripts are dated 1996 (they could be older,
possibly I wasn't using rsync to inherit things when I moved machine
before then :-)). I am a sporadic but regular IDL user ... after all IDL
was used by Giotto at the time of the last Halley comet pass (1986) ...
although I started a bit later.

> In your case, I really don't see why you cannot use
> CREATE_STRUCT(tag1, value1, tag2, value2, ...) directly.

In fact I tested it, and now do it creating a long statement and using
execute statement at the end.

> if init eq 0 then begin
> struct = create_struct(tag, value)
> init = 1
> endif else begin
> struct = create_struct(tag, value, struct)
> endelse

Hmm ... this way you are PREpending new tags ... and possibly creating a
nested structure ?

I want a sort-of flat structure where tags are APpended at the end.
I do something like this:

stmt='structure=create_struct( '

stmt=stmt+"'data', ...."

loop on "keywords"
stmt=stmt+",'"+name+"',"+value
end loop

stmt=stmt+')'
test=execute(stmt)

The first tag is special, it can be a data array or a data substructure.
All other tags come later, and are keywords read from the data file, and
assigned heuristically a data type.

So far I haven't encountered problems in building long statements
(structure with about 200 tags)

For me the issue is closed (happily)

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[Message index]

		quirk End of file encountered before end of program By: LC's No-Spam Newsread[1] on Thu, 11 December 2014 07:03
		Re: quirk End of file encountered before end of program By: Jim Pendleton on Thu, 11 December 2014 07:45
		Re: quirk End of file encountered before end of program By: LC's No-Spam Newsread[1] on Fri, 12 December 2014 05:38
		Re: quirk End of file encountered before end of program By: lecacheux.alain on Fri, 12 December 2014 06:38
		Re: quirk End of file encountered before end of program By: LC's No-Spam Newsread[1] on Mon, 15 December 2014 03:42
		Re: quirk End of file encountered before end of program By: Yngvar Larsen on Mon, 15 December 2014 07:05
		Re: quirk End of file encountered before end of program By: LC's No-Spam Newsread[1] on Wed, 17 December 2014 02:28
		Re: quirk End of file encountered before end of program By: lecacheux.alain on Wed, 17 December 2014 08:49
		Re: quirk End of file encountered before end of program By: Yngvar Larsen on Wed, 17 December 2014 23:57

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