Re: Is it possible to set up an 'instant' idle handler
Re: Is it possible to set up an 'instant' idle handler
- Subject: Re: Is it possible to set up an 'instant' idle handler
- From: "Arthur J. Knapp" <email@hidden>
- Date: Thu, 10 Oct 2002 16:08:35 -0400
>
Date: Thu, 10 Oct 2002 19:44:26 +0100
>
From: has <email@hidden>
>
Subject: Re: Is it possible to set up an 'instant' idle handler
>
Emmanuel wrote:
>
>> on IsTrue( v )
>
>> return ( {v} is not in {false,0,"",missing value} )
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>> end
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> I wonder what IsTrue("false") should return :-)
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Total deadlock between AS's implicit coercion logic and long-established
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standard language conventions? A vicious blood-and-guts fight to the death,
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like throwing a kennel-full of attack dogs into the shark tank? Complete
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spacetime collapse, The End of Everything?
Don't make me sic Shane on you again... ;-)
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Don't say you weren't warned. ;)
Get him, Shane!!!
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p.s. For relevance, here's one our Arthur maybe missed: {}
Interesting that you should bring this up. In JavaScript, an empty
array is still a full fledged object and is therefore not "false":
var a = new Array();
if ( a ) //--> true
Typically, I think in terms of allowing a scripter to pass any number
of "false" type of values to my AppleScript handlers as a way of making
up for the fact that AS doesn't allow optional handlers:
on DoSomething( a, b, c )
if not IsTrue( a ) then set a to "default value for a"
if not IsTrue( b ) then set a to "default value for b"
if not IsTrue( c ) then set a to "default value for c"
...
end
DoSomething( 3.14159, "Hello", "World" )
DoSomething( 3.14159, "Hello", 0 )
DoSomething( 3.14159, 0, "World" )
DoSomething( 3.14159, false, false )
etc...
In a situation like this, I would think it very unlikely that a scripter
would want to call the handler like this:
DoSomething( 3.14159, {}, {} )
though in France, they may want to do this:
DoSomething( 3.14159, "false", "false" )
;-)
{ Arthur J. Knapp, of <
http://www.STELLARViSIONs.com>
a r t h u r @ s t e l l a r v i s i o n s . c o m
}
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