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Re: structure access using strings for tag-names [message #43462 is a reply to message #43421]

Wed, 13 April 2005 14:12

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Mon, 11 Apr 2005 16:02:02 +0200, Thomas Pfaff wrote:

>> Try this out:
>>
>> ;get list of tag names
>> tagnamelist=tag_names(!P)
>>
>> ;find which tag has the name "MULTI"
>> tagindex=where(tagnamelist EQ 'MULTI')
>>
>> ;access the structure
>> print,!p.(tagindex)
>>
>> You can use struct.(0), struct.(1) etc. to access the values
>> in the first, second,... tag.
>>
>> --Paolo
>
> That sounds fine. I had read about the access method using struct.(i)
> but I had missed a possibility to get the index from the name.
>
> By the way. Is anyone using structures this way, or do you prefer
> something similar to the hash_table class, which I found on RSI's website.
> Or do you use even different things for associative storage?

I would prefer a fast built-in hash type, and I would prefer to be
able to use that type, in place of a normal struct, as the underlying
basis of objects. Then I could extend class structure members at
runtime, and do all manner of things which are convenient with a hash
but inconvenient with a fixed, predefined structure.

Maybe it's just the Perl hacker in me.

JD

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[Message index]

		Re: structure access using strings for tag-names By: Thomas Pfaff on Mon, 11 April 2005 07:02
		Re: structure access using strings for tag-names By: JD Smith on Wed, 13 April 2005 14:12
		Re: structure access using strings for tag-names By: Thomas Pfaff on Mon, 18 April 2005 01:31
		Re: structure access using strings for tag-names By: R.Bauer on Wed, 13 April 2005 02:30

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