On Thu, Dec 10, 2015 at 5:49 PM, Konrad Rudolph <konrad.rudolph+r-de...@gmail.com> wrote: > I’ve got the following scenario: I need to store information about an > R function, and retrieve it at a later point. In other programming > languages I’d implement this using a dictionary with the functions as > keys. In R, I’d usually use `attr(f, 'some-name')`. However, for my > purposes I do not want to use `attr` because the information that I > want to store is an implementation detail that should be hidden from > the user of the function (and, just as importantly, it shouldn’t > clutter the display when the function is printed on the console). > > `comment` would be almost perfect since it’s hidden from the output > when printing a function — unfortunately, the information I’m storing > is not a character string (it’s in fact an environment), so I cannot > use `comment`. > > How can this be achieved? > > For reference, I’ve considered the following two alternatives: > > 1. Use `attr`, and override `print.function` to not print my > attribute. However, I’m wary of overriding a core function just to > implement such a little thing, and overriding this function would > obviously clash with other overrides, if somebody else happens to have > a similarly harebrain idea.
Why not use your own S3 class? Hadley -- http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
