[Rd] named empty list

[Hervé Pagès]

Thanks Martin.  H.

Martin Maechler wrote:
>>>>>> "HP" == Hervé Pagès <hpages at fhcrc.org>
>>>>>>     on Thu, 03 Jun 2010 13:25:10 -0700 writes:
> 
>     HP> Hi,
>     HP> I just realized that a named empty list is displayed the same
>     HP> way as an empty list:
> 
>     >> list(aa=2:5)[0]
>     HP> list()
>     >> list()
>     HP> list()
> 
>     HP> For empty atomic vectors, the print method makes the difference:
> 
>     >> c(aa=3L)[0]
>     HP> named integer(0)
>     >> integer(0)
>     HP> integer(0)
> 
>     HP> Maybe lists could do that too?
> 
> Yes, I agree.  I have had at least one situation in the past
> where I had even been confused for a few minutes by this.
> I'm about to add it for R-devel [2.12.0] (only; considering it a
> new feature).
> 
> Martin Maechler, ETH Zurich

-- 
Hervé Pagès

Program in Computational Biology
Division of Public Health Sciences
Fred Hutchinson Cancer Research Center
1100 Fairview Ave. N, M2-B876
P.O. Box 19024
Seattle, WA 98109-1024

E-mail: hpages at fhcrc.org
Phone:  (206) 667-5791
Fax:    (206) 667-1319