Re: ASObjC alloc and object creation
Re: ASObjC alloc and object creation
- Subject: Re: ASObjC alloc and object creation
- From: Jean-Christophe Helary <email@hidden>
- Date: Mon, 29 Jan 2018 09:07:50 +0900
Thank you Shane.
The documentation for NSXMLNode says that it is the base class for
"NSXMLElement, NSXMLDocument, NSXMLDTD, and NSXMLDTDNode". So basically I can
use the "convenience method" documentWithRootElement on it to do the same thing
as my original code:
set theProject to current application's NSXMLNode's
documentWithRootElement:projectRoot
set theProject to current application's NSXMLDocument's alloc()'s
initWithRootElement:projectRoot
Is that kind of mechanism dependent on whether I work with classes that are the
base classes for a number of other classes?
Jean-Christophe
> On Jan 28, 2018, at 22:02, Shane Stanley <email@hidden> wrote:
>
> On 28 Jan 2018, at 11:45 pm, Jean-Christophe Helary
> <email@hidden> wrote:
>>
>> Why can I create an XML node without alloc ?
>
> It's what's known as a convenience method. You're actually making a
> particular subclass of NSXMLNode, an NSXMLElement.
>
> You could have used:
>
> set projectRoot to current application's NSXMLElement's alloc()'s
> initWithName:"omegat"
>
> But convenience methods are common, if not following any particular logic of
> when and where they're provided. Something like "stringWithString:" instead
> of "alloc()'s initWithString:" is a common example.
>
> In applications written using manual memory management, objects created by
> init… methods have to be managed differently.
>
>
> --
> Shane Stanley <email@hidden>
> <www.macosxautomation.com/applescript/apps/>, <latenightsw.com>
>
>
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Jean-Christophe Helary
-----------------------------------------------
http://mac4translators.blogspot.com @brandelune
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