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Re: getting/setting value of unknown tag of structure??? [message #7749 is a reply to message #7653]

Thu, 19 December 1996 00:00

steinhh
Messages: 260
Registered: June 1994

Senior Member

In article <599fg1$18m@jungle.toppoint.de>, alpha@jungle.toppoint.de
(Hendrik Roepcke) writes:

|> pro problem
|> read,mytagname,prompt="Enter Tagname: "
|> read,myvalue,prompt="This into it: "
|>
|> mystruct=create_struct([mytagname,'test'],[myvalue,myvalue])
|>
|> ; this is easy and works
|> print,mystruct.test
|>
|> ; but how to get the myvalue via the first tagname?
|> print,mystruct.????

Are you aware of the following possibility:

; After creation of the structure:

tags = tag_names(mystruct)

ix = where(tags eq mytagname)

; This is not at typo ---------------------------v
if ix(0) ne -1 then print,mytagname+' = ',mystruct.(ix(0))

The tag index notation "struct.(tag_index)" is quite handy when
writing programs dealing with variable structures.

Stein Vidar

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[Message index]

		getting/setting value of unknown tag of structure??? By: alpha on Wed, 18 December 1996 00:00
		Re: getting/setting value of unknown tag of structure??? By: steinhh on Thu, 19 December 1996 00:00

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