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Re: Handler query - exchanging values
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Re: Handler query - exchanging values


  • Subject: Re: Handler query - exchanging values
  • From: Axel Luttgens <email@hidden>
  • Date: Fri, 30 Jun 2006 09:26:30 +0200

On 30/06/06 6:53, Malcolm Fitzgerald wrote:


On 29/06/2006, at 11:31 PM, Yvan KOENIG wrote:


Just matter of curiousity. For my own needs, I prefer to pass the needed values from one handler to an other one.


what need for the " set variables as global" in the handlers ?
I thaught that defining them as global in the main script was sufficient.
For see, I removed the two " set variables as global" instructions from the handlers and didn't sew any odd effect.
Am'I missing something ?


try this
-----------------------------
global apples, pears

set apples to 3
boo()
hoo()  --> error: the variable apples is not defined

on boo()
    set apples to 1
end boo

on hoo()
    display dialog apples
end hoo

-----------------


Something changed recently (time to carefuly read the release notes?).

This has always worked, and is of course the way one would expect globals to be accessed:

  -- OK up to 10.4.7
  boo()
  hoo()

  on boo()
     global apples
     set apples to 1
  end boo

  on hoo()
     global apples
     display dialog apples
  end hoo

But previously, one had terrible lexical scoping clashes that required to be extremely careful:

  -- OK up to 10.3.9
  -- (fortunately) fails since 10.4.x
  global apples

  boo()
  hoo()

  on boo()
     set apples to 1
  end boo

  on hoo()
     display dialog apples
  end hoo

Thanks for having shown that point,
Axel
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  • Follow-Ups:
    • Re: Handler query - exchanging values
      • From: Shane Stanley <email@hidden>
References: 
 >Re: Handler query - exchanging values (From: Malcolm Fitzgerald <email@hidden>)
 >Re: Handler query - exchanging values (From: Malcolm Fitzgerald <email@hidden>)

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