Is there any place method chaining using 'this' is further explained - I
just got very confused!!
Sean, will you be covering things like this in your upcoming CFMX 6.1 Best
Practices?
Walt
-----Original Message-----
From: Sean A Corfield [SMTP:[EMAIL PROTECTED]
Sent: Friday, August 15, 2003 12:35 PM
To: [EMAIL PROTECTED]
Subject: Re: [CFCDev] CFC Persistance
On Friday, Aug 15, 2003, at 07:18 US/Pacific, Brad Howerter wrote:
> Why would you return 'this' from the init function? 'This' is not a
> pointer
> to the object, so what good does it do the method caller?
Method chaining. It allows the following convenient idiom:
<cfset obj = createObject("component","mycfc").init() />
"this" *is* a reference to the object (not a pointer - there are no
pointers in Java or CF).
It can be very convenient to have all mutators (setters, initializers)
return "this" (instead of returning nothing - returntype="void"). Then
you can do:
<cfset obj.setFirstName("Sean").setLastName("Corfield") />
Also note that omitting returntype= is *not* the same as specifying
returntype="void". The latter ensures that your function returns
nothing (i.e., you have no cfreturn tag or only empty cfreturn tags).
If you simply omit the returntype= attribute, you can return anything
and it is unchecked.
Sean A Corfield -- http://www.corfield.org/blog/
"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood
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