[Flashcoders] Q:getter setters vs accessor methods
Hi
Just wondering if there was a consensus on which use of getter/setters is used
most often
traditional getter/setters ie
public function get Size():Number{}
or accessor methods
public function getSize():Number{}
Which do you prefer and why...?
[e] jbach at bitstream.ca
[c] 416.668.0034
[w] www.bitstream.ca
...all improvisation is life in search of a style.
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Re: Re[4]: [Flashcoders] Q:getter setters vs accessor methods
The line in the constructor:
this._size = 2;
is calling the setter. Maybe you meant to call this.__size = 2;
Setters will trigger regardless of whether the property is set by
code within the class itself or from external code.
Nathan
http://www.nathanderksen.com
On Feb 8, 2006, at 5:31 PM, Iv wrote:
Hello JesterXL,
my test shows anoter result and add new question:
-who called getter in the code?
class Test {
private var __size:Number = 0;
function Test() {
this._size = 2;
}
public function get _size():Number {
trace(get _size);
return this.getSize();
}
public function set _size(new_size:Number):Void {
trace(set _size);
this.setSize(new_size);
trace(end set _size\n);
}
//
private function setSize(new_size:Number):Number {
trace(setSize);
this.__size = new_size;
return new_size;
}
private function getSize():Number {
trace(getSize);
return this.__size;
}
}
fla:
foo = new Test()
output:
set _size
setSize
end set _size
get _size
getSize
J size = 2 does:
J - setter runs
J - getter runs for setter
J - getter runs getSize function
J - getSize function gets value, returns it
J - getter returns value for setter
J - setter changes value
--
Ivan Dembicki
__
__
[EMAIL PROTECTED] || http://
www.design.ru
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Re: Re[4]: [Flashcoders] Q:getter setters vs accessor methods
Sorry, ignore me, I misread the question. setter != getter
Nathan
http://www.nathanderksen.com
On Feb 8, 2006, at 9:58 PM, Nathan Derksen wrote:
The line in the constructor:
this._size = 2;
is calling the setter. Maybe you meant to call this.__size = 2;
Setters will trigger regardless of whether the property is set by
code within the class itself or from external code.
Nathan
http://www.nathanderksen.com
On Feb 8, 2006, at 5:31 PM, Iv wrote:
Hello JesterXL,
my test shows anoter result and add new question:
-who called getter in the code?
class Test {
private var __size:Number = 0;
function Test() {
this._size = 2;
}
public function get _size():Number {
trace(get _size);
return this.getSize();
}
public function set _size(new_size:Number):Void {
trace(set _size);
this.setSize(new_size);
trace(end set _size\n);
}
//
private function setSize(new_size:Number):Number {
trace(setSize);
this.__size = new_size;
return new_size;
}
private function getSize():Number {
trace(getSize);
return this.__size;
}
}
fla:
foo = new Test()
output:
set _size
setSize
end set _size
get _size
getSize
J size = 2 does:
J - setter runs
J - getter runs for setter
J - getter runs getSize function
J - getSize function gets value, returns it
J - getter returns value for setter
J - setter changes value
--
Ivan Dembicki
_
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www.design.ru
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Re: [Flashcoders] Q:getter setters vs accessor methods
Right. And in simple assignment, getter's returned value is returned as
the assignment formula's value. According to ECMA-262 (11.13.1), the
formula's value should be its lefthand expression.
var _mc:MovieClip = this.createEmptyMovieClip(my_mc, 1);
var a:Number = _mc._rotation=270;
trace([a, _mc._rotation]); // Output: 270,-90 // Good
var o:MyRotation = new MyRotation();
var b:Number = o.rotation=-90;
trace([b, o.rotation]); // Output: 270,270 // Bad
// ActionScript 2.0 class definition for Testing
class MyRotation {
var _rotation:Number = 0;
// gets the value between 0 and 360
function get rotation():Number {
trace([get, _rotation]);
return (_rotation%360+360)%360;
}
// sets the value between -180 and 180
function set rotation(n:Number):Void {
_rotation = (n%360+540)%360-180;
trace([set, _rotation]);
}
}
_
JesterXL wrote:
Setters call the getters automatically.
Good luck,
Fumio Nonaka
mailto:[EMAIL PROTECTED]
http://www.FumioNonaka.com/
My bookshttp://www.FumioNonaka.com/Books/index.html
Flash communityhttp://F-site.org/
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Re: [Flashcoders] Q:getter setters vs accessor methods
Sorry. The formula's value should be its assignment expression, i.e. righthand side expression. _ Fumio Nonaka wrote: Right. And in simple assignment, getter's returned value is returned as the assignment formula's value. According to ECMA-262 (11.13.1), the formula's value should be its lefthand expression. Good luck, Fumio Nonaka mailto:[EMAIL PROTECTED] http://www.FumioNonaka.com/ My bookshttp://www.FumioNonaka.com/Books/index.html Flash communityhttp://F-site.org/ ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
