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From: hpoppe@scdpyr.UUCP (Herb Poppe)
Newsgroups: comp.sys.mac
Subject: Re: HyperCard arrays
Message-ID: <192@scdpyr.UUCP>
Date: Mon, 26-Oct-87 14:33:56 EST
Article-I.D.: scdpyr.192
Posted: Mon Oct 26 14:33:56 1987
Date-Received: Thu, 29-Oct-87 23:06:41 EST
References: <173@stech.UUCP> <191@scdpyr.UUCP>
Organization: Natl Ctr Atmospheric Research, Boulder, CO
Lines: 47
Summary: HyperCard variables work like fields

In article <191@scdpyr.UUCP>, faulkner@scdpyr.UUCP (Bill Faulkner) writes:
> In article <173@stech.UUCP>, sysop@stech.UUCP (Jan Harrington) writes:
> 
> > HyperTalk doesn't directly support arrays.  Is there some way to get the
> > same effect (by using variables names like VName & k, where k contains
> > a number that changes?)?  Has anyone come across this yet and found a
> > good solution?
> 
> One thing that would work, but isn't really elegant is to create an
> invisable field and use the various lines as elements of the array.
> The refernce to this would be similar to:
> 
> 	add 23 to line k of field "Array"
> 
> You could even extend this to two dimensions by using the word of a line,
> such as
> 
> 	put 5 into word i of line j of field "2-D Array"
> 
> Does anybody know of a better solution?

Yes, you can use variables in a manner similar to fields to simulate
arrays.  For example, you can say "line 1 of data", where "data" is the
name of a local or global variable. For example:

put 1 into line 1 of data
put 2 into line 2 of data
put 4 into line 3 of data
put (line 1 of data) + (line 2 of data) + (line 3 of data) into message

Of course, you can use variables instead of literals:

put 3 into n
put line n of data into message

Instead of 'lines' you can use 'items':

put "ABC" into item 2 of data

For multiply-dimensioned arrays you can do:

put "ABC" into item 2 of line 3 of data

-- 
Herb Poppe      NCAR                         INTERNET: hpoppe@scdpyr.UCAR.EDU
(303) 497-1296  P.O. Box 3000                   CSNET: hpoppe@ncar.CSNET
		Boulder, CO  80307               UUCP: hpoppe@scdpyr.UUCP