[Rcpp-devel] feature proposal: ListOf

Romain Francois romain at r-enthusiasts.com
Fri Oct 25 21:00:14 CEST 2013


Cool. I've got lots on my plate right now, so this is not a priority.
Did you have a chance to look at the (simplistic) implementation of 
ListOf in dplyr: 
https://github.com/hadley/dplyr/blob/master/inst/include/tools/ListOf.h

The indexing operator should be proxified so that we could handle 
assignments, i.e.:

NumericVector z ;
ListOf<NumericVector> x( xxx );
x[0] = z ;

At the moment it only has read access because that's all I needed for 
now in dplyr.

So maybe if we wanted something more generic in Rcpp, this should be 
designed a bit more.

Romain

Le 25/10/2013 20:40, Kevin Ushey a écrit :
> Hi Romain, Dirk,
>
> I'd be willing to contribute an Rcpp Gallery post and some tests if
> this were added to Rcpp; I think it would be quite useful.
>
> -Kevin
>
> On Wed, Oct 23, 2013 at 6:31 AM, Dirk Eddelbuettel <edd at debian.org> wrote:
>>
>> On 23 October 2013 at 14:31, Romain Francois wrote:
>> | Le 23/10/2013 13:47, Dirk Eddelbuettel a écrit :
>> | > As always, preferably with a usage example (Rcpp Gallery post?  Section in a (new)
>> | > vigntte?) and tests so that people have some info on how to use it.
>> |
>> | That means it will take me more time than what I wanted to commit to
>> | this. I'll come back to it later then.
>>
>> Up to you.  FWIW your previous commits are still undocumented in NEWS.Rd.
>>
>> Dirk
>>
>> --
>> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com


-- 
Romain Francois
Professional R Enthusiast
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