Hi Romain,
> > Because `$` doesn't evaluate its field-name argument, is
> >
> > field.name <- "value"
> > do.call(`$`, list(x, field.name))
> >
> > the recommended way of accessing methods whose names are computed at
> > run-time? It does work; just wondering if there's a better way.
>
Hi Romain,
Thanks for the reply.
> > The fact that 'x[["value"]]' finds the method only if I've first done
> > 'x$value' seemed odd.
>
> This is an implementation artefact. In short, you are not supposed to
> use [[.
OK, fair enough :)
Because `$` doesn't evaluate its field-name argument, is
Hello,
This is an implementation artefact. In short, you are not supposed to
use [[.
Romain
Le 22/10/12 10:54, North, Ben a écrit :
Hi,
I recently came across some behaviour of `[[` and `$` which surprised
me. I was trying to access a method of a class implemented using Rcpp,
choosing the
Hi,
I recently came across some behaviour of `[[` and `$` which surprised
me. I was trying to access a method of a class implemented using Rcpp,
choosing the method name at runtime, but the example below uses a fixed
method name to keep it short.
The full C++ code:
- - - - 8< - - - -
#include
