Hi Miquel,
You have a couple of choices: Function#bind[1] (you could use
Function#curry if you didn't need context, but I see you do) or
Function#bindAsEventListener[2]. They basically come to the same
thing, it's just a matter of whether your function receives the event
parameter as the first or the last parameter.
Option 1: Using Function#bind and making the event parameter your
last param:
$('myelement').observe('click', this.fooFunction.bind(this, 'a',
'b'));
fooFunction: function(paramA, paramB, event) {
// ...
}
In this option, Function#bind does two things for you: It binds
context (this), and it burns in (or curries) two parameters to
the function. When the element is clicked, the function will be
called with paramA = 'a', paramB = 'b', and event = the event.
Parameters curried via Function#bind are always the first parameters
to the function.
Option 2: Using Function#bindAsEventListener and making the event
parameter your first param:
$('myelement').observe('click', this.fooFunction.bindAsEventListener
(this, 'a', 'b'));
fooFunction: function(event, paramA, paramB) {
// ...
}
Function#bindAsEventListener also binds context and curries
parametesr, but it always makes the event parameter the first
parameter to your function. It's a special case.
(And again, if you didn't need context, you could use Function#curry
[3] and the event would be the last parameter.)
[1] http://prototypejs.org/api/function/bind
[2] http://prototypejs.org/api/function/bindAsEventListener
[3] http://prototypejs.org/api/function/curry
HTH,
--
T.J. Crowder
tj / crowder software / com
Independent Software Engineer, consulting services available
On May 29, 12:12 am, Miguel Beltran R. yourpa...@gmail.com wrote:
Hi list
I have a function fooClass what i want convert for more generic.
fooClass = Class.create()
fooClass.addMethods({
fooFunction: function(evt){
//do stuff
}
});
If change the function to fooFunction(evt, PARAM){}
how must be the call?
foo= new FooClass();
someelement.observe('click', foo.fooFunction('apples'));
otherelement.observe('click', foo.fooFunction('orange'));
this is correct way?
Thanks
--
Lo bueno de vivir un dia mas
es saber que nos queda un dia menos de vida
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