variables.instance.varname will create a "protected" variable. That means it can be accessed inside the CFC and by any descendants of the CFC, however it cannot be accessed outside the CFC. ( Sean described the difference between protected and private earlier in this thread). The variable it creates is a structure named instance with a key of "varname". ( I assume most of your CFCs have more than one instance variable of course... )
this.variables.instance.varname will create a public variable. That means it can be accessed from within the CFC, within its descendants, and from outside the CFC. Unless I miss my guess, it will create a structure called variables (probably not a good name for a variable) with a "key" named instance. Instance is actually another structure, which contains a key named varname.
so..
variables.ThisVar cannot be accessed using componentInstance.ThisVar this.ThisVar can be accessed using componentInstance.ThisVar
Make sense? I've never "this", but I assume structures inside the 'scope' can be accessed in the same manner ( componentInstance.this.variables.instance.varname )
At 06:44 PM 11/14/2004, you wrote:
I didn't realize that the THIS scope was public, I used the developer study guide as my reference and thought it referred to the private scope of each instance of a CFC...
I took an intro Java class and trying to put things to work in CF.
Previously I had placed all instance variables in the variables scope, so basically at the top of the CFC I would declare variables.instance.varname for each instance variable...and then I decided to change it to this.variables.instance.varname... now I'm confused, whats the difference?
-Steve
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>From: Sean Corfield <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: Re: [CFCDev] concerning this / variables scope in cfc >Date: Sun, 14 Nov 2004 09:01:45 -0800 > >On Sun, 14 Nov 2004 17:28:07 +0100, Magnus Wege <[EMAIL PROTECTED]> wrote: > > In the overview it is mentioned that you shouldn't use the variables scope > > ("avoid using"). > >That's very out-of-date as it refers to bugs in CFMX 6.0 that have >been fixed for two years (with CFMX 6.1). > > > Though Nando is right that the "this" scope is available to > > the caller which breaks the encapsulation paradigm. > >"this" scope is the equivalent to "public" data members - and all the >literature out there will tell you not to use public data members. > >"variables" scope is the equivalent of "protected" data members. If >your object needs state information, it will use "variables" scope. >"variables" scope exists for the lifetime of the CFC instance (which >depends on the scope in which the CFC instance itself is stored). > >"var" - not exactly a scope, but you should use it to declare any and >all variables that should be local to a specific function call. Such >variables are created fresh for each function call and exist only >inside that function. > > > -----Ursprüngliche Nachricht----- > >And you really need to trim your posts... > >[many hundreds of lines deleted] >-- >Sean A Corfield -- http://www.corfield.org/ >Team Fusebox -- http://www.fusebox.org/ >Breeze Me! -- http://www.corfield.org/breezeme >Got Gmail? -- I have 1 invite > >"If you're not annoying somebody, you're not really alive." >-- Margaret Atwood >---------------------------------------------------------- >You are subscribed to cfcdev. To unsubscribe, send an email >to [EMAIL PROTECTED] with the words 'unsubscribe cfcdev' >in the message of the email. > >CFCDev is run by CFCZone (www.cfczone.org) and supported >by Mindtool, Corporation (www.mindtool.com). > >An archive of the CFCDev list is available at [EMAIL PROTECTED]
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