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From: taylorj@yvax.byu.edu
Newsgroups: comp.sys.mac.hypercard
Subject: Re: How to disable command-M?
Message-ID: <1469taylorj@yvax.byu.edu>
Date: 8 Aug 90 02:43:33 GMT
Lines: 33

In <10955@cs.utexas.edu>, kseah@cs.utexas.edu (Kenneth Cheng-Lim Seah) writes:

>You can have a series of nested if's to check for the various other
                         ^^^^^^^^^^^^
>menu calls (e.g. Help, Find... etc).


I don't mean to pick on the poster, but this seemed an opportune time to point
out a useful but seemingly little-known feature of HyperTalk: that you don't
need to nest if's.  E.g.

  if foo = "bar" then ...
  else
    if foo = "blee" then ...
    else
      if foo = "xyzzy" then ...
      end if
    end if
  end if

can be written much more simply and legibly as

  if foo = "bar" then ...
  else if foo = "blee" then ...
  else if foo = "xyzzy" then ...

Although HyperTalk can't do case statements (sigh...) this at least lets you
get much closer than using nested if's.


Jim Taylor
Microcomputer Support for Curriculum   |
Brigham Young University               |   Bitnet: taylorj@byuvax.bitnet
101 HRCB, Provo, UT  84602             |   Internet: taylorj@yvax.byu.edu