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Original Raw

Options that are local to the package that sets them

William Dunlap 
You can put the following 3 objects, an environment and 2 functions
that access it, in any package that need some package-specific
storage (say your pkgB1 and pkgB2).
   .pkgLocalStorage <- new.env(parent = emptyenv())
   assignInPkgLocalStorage <- function(name, object) {
       .pkgLocalStorage[[name]] <- object
   }
   getFromPkgLocalStorage <- function(name, object) {
       .pkgLocalStorage[[name]]
   }
Leave the environment private and export the functions.  Then a user can
use them as
   pkgB1::assignInPkgLocalStorage("myPallete", makeAPallete(1,2,3))
   pkgB2::assignInPkgLocalStorage("myPallete", makeAPallete(5,6,7))
   pkgB1::getFromPkgLocalStorage("myPallete") # get the 1,2,3 pallete

If only one of pkgB1 and pkgB2 is loaded you can leave off the pkgBn::.

A package writer can always leave off the pkgBn:: as well.

Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Fri, Oct 31, 2014 at 4:34 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> wrote:

Thread (9 messages)

Gábor Csárdi Options that are local to the package that sets them Oct 31 Gabor Grothendieck Options that are local to the package that sets them Oct 31 William Dunlap Options that are local to the package that sets them Oct 31 Gábor Csárdi Options that are local to the package that sets them Oct 31 Gábor Csárdi Options that are local to the package that sets them Oct 31 Gabor Grothendieck Options that are local to the package that sets them Oct 31 Martin Morgan Options that are local to the package that sets them Oct 31 Gábor Csárdi Options that are local to the package that sets them Oct 31 Gábor Csárdi Options that are local to the package that sets them Oct 31