Hi
I'd like to know something :
Lets say I have two classes A and B, where A is B's superclass. B's
initialize method initialize her own variables, but how could I do in
order to run A.initialize before B.initialize when I write B.new ?
I hope my text is understandable.
Thanks everyone.
Bye
Julien Vivenot
jvivenot [2006-08-21 01:35]:
Lets say I have two classes A and B, where A is B's superclass. B's
initialize method initialize her own variables, but how could I do in
order to run A.initialize before B.initialize when I write B.new ?
If I understood your problem correctly, you're after the "super" method.
Try the following code:
class A
def initialize
puts "initializing instance of A"
end
end
class B
def initialize
super
puts "initializing instance of B"
end
end
Regards,
Tilman
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
Tilman Sauerbeck wrote:
jvivenot [2006-08-21 01:35]:
Lets say I have two classes A and B, where A is B's superclass. B's
initialize method initialize her own variables, but how could I do in
order to run A.initialize before B.initialize when I write B.new ?If I understood your problem correctly, you're after the "super" method.
Try the following code:<snip />
And in the event that you some arguments to B that
A does not know how to handle, use the second form:
class A
def initialize(foo)
puts "initializing instance of A with #{foo}"
end
end
class B
def initialize(foo, bar)
super(foo)
puts "initializing instance of B with #{foo} and #{bar}"
end
end
Wonderful !
Thanks.
I think there will be many days during which I'll stay a Ruby-Nuby....
Bye, and thanks everyone
Julien Vivenot
Eero Saynatkari wrote:
Tilman Sauerbeck wrote:
> jvivenot [2006-08-21 01:35]:
>> Lets say I have two classes A and B, where A is B's superclass. B's
>> initialize method initialize her own variables, but how could I do in
>> order to run A.initialize before B.initialize when I write B.new ?
>
> If I understood your problem correctly, you're after the "super" method.
> Try the following code:
>
> <snip />And in the event that you some arguments to B that
A does not know how to handle, use the second form:class A
def initialize(foo)
puts "initializing instance of A with #{foo}"
end
endclass B
def initialize(foo, bar)
super(foo)
puts "initializing instance of B with #{foo} and #{bar}"
end
end> Regards,
> Tilman--
Posted via http://www.ruby-forum.com/\.
Actually, it seems that I if I write only super because the super
initialize needs no argument, the super method gives every arguments of
the B class to the A initialize, and thus I encounter a ArgumentError.
That's OK
Thanks
Julien Vivenot
jvivenot wrote:
Wonderful !
Thanks.I think there will be many days during which I'll stay a Ruby-Nuby....
Bye, and thanks everyone
Julien Vivenot
Eero Saynatkari wrote:
> Tilman Sauerbeck wrote:
> > jvivenot [2006-08-21 01:35]:
> >> Lets say I have two classes A and B, where A is B's superclass. B's
> >> initialize method initialize her own variables, but how could I do in
> >> order to run A.initialize before B.initialize when I write B.new ?
> >
> > If I understood your problem correctly, you're after the "super" method.
> > Try the following code:
> >
> > <snip />
>
> And in the event that you some arguments to B that
> A does not know how to handle, use the second form:
>
> class A
> def initialize(foo)
> puts "initializing instance of A with #{foo}"
> end
> end
>
> class B
> def initialize(foo, bar)
> super(foo)
> puts "initializing instance of B with #{foo} and #{bar}"
> end
> end
>
> > Regards,
> > Tilman
>
> --
> Posted via http://www.ruby-forum.com/\.
If you don't want to pass any arguments to the superclass's initialize
use this version:
super() # no arguments
So you've got:
super # pass along the arguments to the current method
super() # pass no arguments
super(1,2) # pass these explicit arguments
Gary Wright
On Aug 20, 2006, at 6:25 PM, jvivenot wrote:
Actually, it seems that I if I write only super because the super
initialize needs no argument, the super method gives every arguments of
the B class to the A initialize, and thus I encounter a ArgumentError.
That's OK
Thanks
Oh, thanks, but actually, I found it by myself, my previous message was
a just a notification of the fact that it would be better to write ()
instead of nothing just after super.
Thanks anyway.
Bye
Julien Vivenot
gwtmp01@mac.com wrote:
On Aug 20, 2006, at 6:25 PM, jvivenot wrote:
> Actually, it seems that I if I write only super because the super
> initialize needs no argument, the super method gives every
> arguments of
> the B class to the A initialize, and thus I encounter a ArgumentError.
> That's OK
> ThanksIf you don't want to pass any arguments to the superclass's initialize
use this version:super() # no arguments
So you've got:
super # pass along the arguments to the current method
super() # pass no arguments
super(1,2) # pass these explicit argumentsGary Wright