Re: Handlers in a variable

Subject: Re: Handlers in a variable
From: "Stockly, Ed" <email@hidden>
Date: Wed, 20 Jan 2016 01:32:28 +0000
Thread-topic: Handlers in a variable

property someHandler : ""

on double(aNumber)

return aNumber * 2

end double

on call(someHandler, aValue)

someHandler(aValue)

end call

on DoMyHandler()

someHandler(4)

call(double, 4)

end DoMyHandler

on DoFirstHander()

set aValue to "3"

set someHandler to double

someHandler(4) -- fails here if someHandler is not a property

end DoFirstHander

on run

set someHandler to ""

DoFirstHander()

someHandler(4)

call(double, 4)

DoMyHandler()

end run

>>>Most of that is the same as the OP's code.

Well, yes but there are important modifications. I think the OP's script simply had a mislabeled variable, which caused the failure.

>>>What are you trying to convey?

The version above works only if someHandler is a property. If you note out that line it fails.

So even though handlers are global in scope, for some reason you can't set a local variable to a handler, but you can set a global variable or a property to a handler.

(In your previous example, the variable wasn't a property, but it was global, not local.)

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Follow-Ups:
- Re: Handlers in a variable
  - From: Christopher Stone <email@hidden>

References:
	>Handlers in a variable (From: "Mark J. Reed" <email@hidden>)
	>Re: Handlers in a variable (From: Chris Page <email@hidden>)
	>Re: Handlers in a variable (From: "Stockly, Ed" <email@hidden>)
	>Re: Handlers in a variable (From: Chris Page <email@hidden>)

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