Prof Brian D Ripley <[EMAIL PROTECTED]> writes: > On Sun, 29 Aug 2004, Erich Neuwirth wrote: > > > In R 1.9.1, attaching an object more than once puts the object's name on > > the search path more than once also. Therefore, to remove it, one has to > > detach it multiply. > > Wouldn'tn it make sense to change the behavior of attach in a way > > that object names are not added to the search path more than once? > > They need not be the same object, so no. It's quite common practice to > modify an object, attach it temporarily and detach it again. I suspect > that people using attach() frequently should be thinking more in terms of > with().
That's one argument. Another is that attach(foo) followed by detach() should leave the search path unchanged. I.e. if attach() is sometimes a NOP, we must arrange so that the next detach() is one too. You could do that I suppose, but then there's code that acts depending on what it finds in search(), and... Or, briefly: That way lies madness! -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
