Le 17/11/10 11:39, Janko Thyson a écrit :
-----Ursprüngliche Nachricht-----
Von: Simon Urbanek [mailto:simon.urba...@r-project.org]
Gesendet: Mittwoch, 17. November 2010 11:35
An: Janko Thyson
Cc: 'r-de...@r-project. org'
Betreff: Re: [Rd] R5 reference classes: how to initialize exactly?
Just a clarification for posterity - R5 has nothing to do with the new
reference classes. It's not even an official name, but informally it's a
collection of ideas for an entirely new object system that can replace
both S3 and S4 (not that it will but it should be seen as having the
capability to do so technically). Reference classes are just an addition
to S4.
Cheers,
Simon
Thanks for that clarification. I picked that name up from the Google
TechTalks presentation of Dirk and Romain. So I refer to them as S4
reference classes in future posts?
Regards,
Janko
Sorry about that. It was meant as a sort of private joke. (we do say in
the talk that this is not an official name).
On Nov 16, 2010, at 12:30 AM, Janko Thyson wrote:
Sorry, I was stupid:
MyRefObj<- setRefClass("Blabla", .)
One can always get the generator object of an defined class with
'getRefClass()'. So:
g<- getRefClass("Blabla")
x<- g$new(.)
Regards,
Janko
Von: Janko Thyson [mailto:janko.thy...@ku-eichstaett.de]
Gesendet: Dienstag, 16. November 2010 00:27
An: 'r-de...@r-project. org'
Betreff: R5 reference classes: how to initialize exactly?
Dear List,
So far, I really like those new R5 classes. But what kind of puzzles
me is
that it's not just enough to define the actual reference class, I also
have
to assign it to an object (e.g. 'MyRefObj') in order to fire
'MyRefObj$new(.)'.
S4:
setClass("Blabla", .)
x<- new("Blabla")
R5:
MyRefObj<- setRefClass("Blabla", .)
x<- MyRefObj$new(.)
But then how do I define a reference class in a package that should be
available after the package is loaded via 'library(my_pkg)' as there
is no
'MyRefObj' at startup yet? Do I have to call the script where the
definition
lives?
Thanks for any comments,
Janko
--
Romain Francois
Professional R Enthusiast
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr
|- http://bit.ly/9VOd3l : ZAT! 2010
|- http://bit.ly/c6DzuX : Impressionnism with R
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