Object orientation?
"Yves Gauvreau" <cyg at sympatico.ca> writes:
Up to now there is no real problem as I could use the following construct for these let and set methods or functions: MyO <- MyO.let(PropertyName="ThisProperty", ThisValue). But what I would like to be able to do in order to let or set (as above) one of MyO properties for example is only use: MyO.let(PropertyName="ThisProperty", ThisValue). So my question is: Can this be done in a proper and acceptable R fashion? I know I could use super assign (<<-) but I think some say it's best avoided.
Generally, that's when people try to turn R (or S) into a macro
language. There could be situations where it's the right thing...
However, for this situation, how about something like
class(MyO) <- "foo"
"$<-.foo" <- function(x, name, value)
{
if ( !is.null(x$let) )
x$let(PropertyName=name, value)
else
x[[name]] <- value
}
MyO$ThisProperty <- ThisValue
(but wouldn't x$let or MyO.let need to have some way of figuring out
which object is its owner??)
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._