On Wed, 17 Sep 2003, Simon Fear wrote:
There have been various elegant solutions to test for the presence
of a particular named parameter within a ... argument, such as
if (!is.null(list(...)$ylim))
if (ylim %in% names(list(...)))
I think I'd have to comment these lines pretty clearly if
Thanks for the insight.
-Original Message-
From: Prof Brian Ripley [mailto:[EMAIL PROTECTED]
snip
dots - list(...)
haveYlim - ylim %in% names(dots)
is the sort of thing we still understand 5 years later.
I didn't say understand, I said easily follow. Obviously how
easily is
At Wednesday 11:19 AM 9/17/2003 +0100, Simon Fear wrote:
There have been various elegant solutions to test for the presence
of a particular named parameter within a ... argument, such as
if (!is.null(list(...)$ylim))
if (ylim %in% names(list(...)))
I think I'd have to comment these lines pretty
Tony, I don't understand what you mean. Could you give
an example?
-Original Message-
From: Tony Plate [mailto:[EMAIL PROTECTED]
... I'm not saying never write functions that use ...,
I'm just saying never write functions that depend on a particular
argument being passed via
Simon, I agree, for some (maybe most) arguments it is good to know what
defaults are being used. But there are some for which I really don't want
to know. An example of the latter is arguments that control interaction
with a database. Suppose I have a low-level interaction function that
