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From: chuq%plaid@Sun.COM (Chuq Von Rospach)
Newsgroups: comp.sys.mac.hypercard
Subject: Find vs. Sort
Message-ID: <32530@sun.uucp>
Date: Fri, 30-Oct-87 18:25:04 EST
Article-I.D.: sun.32530
Posted: Fri Oct 30 18:25:04 1987
Date-Received: Wed, 4-Nov-87 23:17:43 EST
Sender: news@sun.uucp
Lines: 40

I've found an interesting inconsistency in hypercard. Fortunately, it works
to my advantage, but it gave me some consternation before tracked it down,
so I thought I'd warn folks about it.

I have a multi-background stack that I want to put in a certain order. To
do this, I've created a background field on each stack called "Key-Index"
and I put a value into this that tells the sort command what order to put
the cards. If I then do a:
	
	Sort by background field "Key-Index"

everthing is fine.

The fun comes with find. While sort will use "Key-Index" on the cards from
both backgrounds, I've found that "find" doesn't cross to the next
background -- it will ONLY find on cards with the same background as the
card I am currently on. 

As an example, I'm looking at card 1, background one. "Key-index" is
"foo-bar-1". There are two cards subsidiary to this, and they both have a
"key-index" of "foo-bar-2". if I try:

	find "foo-bar-2" in background field "Key-Index" 

fails. However, if I use:

	go to first card with background "Background 2"
	find "foo-bar-2" in background field "Key-Index" 

It works fine. 

As it happens, this is just fine for my stack, but the behavior is
non-intuitive and I thought I'd warn folks. 

Anyone want to hazard a guess why sort and find work differently on the same
field?

chuq
---
Chuq "Fixed in 4.0" Von Rospach			chuq@sun.COM	Delphi: CHUQ