On 30/05/2010 3:13 PM, Gabor Grothendieck wrote:
This function call returns 3 but should return 32. ..0 has no special
significance in R as far I know yet it seems to be acting as if it
were ..1 . Comments?
Actually, ..0 is a reserved symbol. (This is just barely documented in
the R Language Defn, with more detail in R Internals.) It stands for
the "zeroth element of ..." That definition makes no sense (indexing of
... starts at 1), so we should probably generate an error when you use
it, and perhaps when you try to redefine it by using it as an argument.
But this is really a case of you doing something you shouldn't, and the
error handling not slapping you on the wrist.
Duncan Murdoch
ff <- function(..0, ...) ..0
ff(32, 3)
[1] 3
R.version.string
[1] "R version 2.11.0 Patched (2010-04-26 r51822)"
win.version()
[1] "Windows Vista (build 6002) Service Pack 2"
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