On Jan 4, 7:12 pm, Tobie Langel <tobie.lan...@gmail.com> wrote:
[...]
> On the other hand, you'd have to handle this like so with your
> proposed implementation:
>
> var Child = Class.create(Parent, {
> doStuff: function() {
> return this.getSuper('doStuff').apply(this, arguments) + ' extra
> stuff';
> }
>
> });
>
> Which is a lot less elegant imho.
It is, no doubt, less elegant when passing `arguments` object along.
It's, nevertheless, dead simple when working with actual named
arguments.
var Child = Class.create(Parent, {
doStuff: function(foo) {
return this.getSuper('doStuff')(foo);
// looks just as "elegant" as:
return this.callSuper('doStuff', foo);
}
});
I understand that "slicing" arguments into an actual array is not
pleasant, but isn't it something irrelevant to "super" implementation?
Now that `$super` as a first argument is gone, I don't see why it
would be common to "slice(1)" arguments object. Having a reference to
super method on the other hand gives a freedom to do anything you
would do with a regular Function object - call, apply, bind, etc. I
think requesting a reference to a function object is as
"javascriptish" as it gets : )
`this.getSuper('doStuff').apply(this, arguments)`
is clearly not as nice as a special-cased:
`this.applySuper('doStuff', arguments);`
It seems like a too minor annoyance to worry about, but if many will
find it useful - sure - let's add it.
[...]
Class.Base = Class.create({
getSuper: function(methodName) {
return this.constructor.superclass.prototype[methodName].bind
(this);
}
});
var Person = Class.create(Class.Base, {
initialize: function(name) {
this.name = name;
},
say: function(message) {
return this.name + ': ' + message;
},
say2: function(){
return this.name + ': ' + Array.prototype.join.call(arguments, '
');
}
});
var Pirate = Class.create(Person, {
say: function(message) {
return this.getSuper('say')(message + ', Argh!');
},
say2: function() {
return this.getSuper('say2').apply(null, arguments) + ', Argh!'
}
});
(new Pirate('Joe')).say('Hi');
(new Pirate('Joe')).say2('Hi', 'Bye');
--
kangax
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