Oehlschlägel" ,
r-devel@r-project.org
Betreff: Re: [Rd] problem in levels<- and other inconsistencies
Hi,
I totally agree that having foo(x) <- foo(x) behave like a no-op
is a must. This is something I try to be careful about when I design
my own objects and their getters and setters.
Hi,
I totally agree that having foo(x) <- foo(x) behave like a no-op
is a must. This is something I try to be careful about when I design
my own objects and their getters and setters.
Just wanted to mention though that there is notorious violation of
this:
x <- list(3:-1, NULL)
x[[2]] <- x[
# A couple of years ago
# I helped making R's character NA handling more consistent
# Today I report an issue with R's factor NA handling
# The core problem is that
# levels(g) <- levels(g)
# can change the levels of g
# more details below
# Kind regards
# Jens Oehlschlägel
# Say I have an NA ele
