Thanks Martin for your patient and detailed explanations!
So with the base4 solution, base would import base4 so lapply() could
call base4::as.list()? Sounds good.
Making as.list() a *primitive* function with C-internal S3 and S4
method dispatch: like for length(), etc...? Sounds good too.
I'm wo
> "HP" == Herve Pages <[EMAIL PROTECTED]>
> on Thu, 31 Jan 2008 10:26:31 -0800 writes:
HP> Hi, If needed, lapply() tries to convert its first
HP> argument into a list before it starts doing something
HP> with it:
>> lapply
HP> function (X, FUN, ...)
HP> {
> "GaGr" == Gabor Grothendieck <[EMAIL PROTECTED]>
> on Thu, 31 Jan 2008 15:44:26 -0500 writes:
GaGr> I just checked and the code that previously triggered
GaGr> the promises in lists bug seems to work now so I guess
GaGr> it is a different problem.
*very* different indeed
I just checked and the
code that previously triggered the promises in lists
bug seems to work now so I guess it is a different
problem.
# code below previously triggered errors but now works
# R 2.6.2 (2008-01-26 r44181) on Vista
f <- function(x) environment()
z <- as.list(f(7))
dput(z)
structure(
Hi Gabor,
Quoting Gabor Grothendieck <[EMAIL PROTECTED]>:
> The problem of promises not being evaluated in
> lists has been discussed before.
>
> I think its fixed in the development version of R. See
> r44139 on Jan 24, 2008 in http://developer.r-project.org/R.svnlog.2007
>
I'm using R-devel
The problem of promises not being evaluated in
lists has been discussed before.
I think its fixed in the development version of R. See
r44139 on Jan 24, 2008 in http://developer.r-project.org/R.svnlog.2007
On Jan 31, 2008 1:26 PM, <[EMAIL PROTECTED]> wrote:
> Hi,
>
> If needed, lapply() tries to
Hi,
If needed, lapply() tries to convert its first argument into a list
before it starts doing something with it:
> lapply
function (X, FUN, ...)
{
FUN <- match.fun(FUN)
if (!is.vector(X) || is.object(X))
X <- as.list(X)
.Internal(lapply(X, FUN))
}
But in practice,
