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From: scasterg@magnus.acs.ohio-state.edu (Stuart M Castergine)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Why no 'case' statement in Hypertalk?  Suggestions?
Message-ID: <1991Jun7.173856.7012@magnus.acs.ohio-state.edu>
Date: 7 Jun 91 17:38:56 GMT
References: <55655@nigel.ee.udel.edu>
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In article <55655@nigel.ee.udel.edu> johnston@oscar.ccm.udel.edu writes:
>Still simpler (forget all the else statements):
>
>on keyDown key
>  if key is "a" then beep
>  if key is "b" then beep 2
>  if key is "c" then beep 3
>  pass keyDown
>end keyDown
>
>Bill (johnston@minnie.me.udel.edu)

But much slower -- you force the script to evaluate all the
expressions, which is time-consuming if there are very many. If you
insert else statements, flow will exit the construct after it finds a
condition that tests true, saving you many needless expression
evaluations. 

-- 
scasterg@magnus.acs.ohio-state.edu	Stuart M Castergine
"Step by step they were led to practices which disposed to vice -- the
lounge, the bath, the elegant banquet. All this in their ignorance
they called civilisation, when it was but part of their servitude."