[R] Problem accessing sub-methods of functions stored in a vector
ggrothendieck at gmail.com
Fri Feb 26 18:19:18 CET 2010
On Fri, Feb 26, 2010 at 11:57 AM, Matt Asher <status at quo.org> wrote:
> agents <- list(agent(1), agent(2))
> worked perfectly. Thanks Uwe!
> I'm not fully sure what you mean by this:
> Anyway, I hope you know that lexical scoping will yield in the
> environments attached to all those functions they have been generated in
> and you know about possible consequences. If not, you really should not
> be doing this ... (nor using <<- ) ...
> I used the <<- assignment because I am treating these variables in the
> sub-function as "belonging" to the parent function (like using "self" or
> "this" in other languages). I am basically treating my agent function like a
> class that can have instances and class vars, without having to use R's
> backwards (IMO) way of doing OOP.
In that case you might want to look at the proto package
which can do this a bit more cleanly and also allows for delgation
(i.e. the counterpart to inheritance in the prototype model)
> agent <- proto(id = NA, get_id = function(self) self$id, set_id = function(self, id) self$id <- id)
More information about the R-help