I can, after carefully reading about the returned values, see why
library("MASS", "MASS", character.only=TRUE)
has to chose between loading the package and displaying the help (I
thought I had found a nice shortcut), but wouldn't the documentation be
better if it said that the two are incompatible and that package= takes
precedence over help=?
As an aside, is there a way to explicitly specify a missing argument in
a function call? For an example using the same function as before,
library(, "MASS", character.only=TRUE)
displays the help but can be a little hard on the programmer's eyes.
However,
library(NULL, "MASS", character.only=TRUE)
library(NA, "MASS", character.only=TRUE)
library({}, "MASS", character.only=TRUE) # signals error.
doesn't do the same at all (I thought the first one would, based on the
"whenever" in the documentation: "It is used whenever there is a need to
indicate or specify that an object is absent.").
Is there in the language a lexical x such that f(x, ...) is the same as
f(, ...)?
(Yes, I know about named arguments and I like them, I am just trying to
learn syntax here.)
Allan
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