Duncan Murdoch wrote: > On 10/15/2006 2:48 PM, Seth Falcon wrote: >> Hi, >> >> I would be nice if names() returned the equivalent of ls() for >> environments. > > Wouldn't that just confuse people into thinking that environments are > vectors? Wouldn't it then be reasonable to assume that > env[[which(names(env) == "foo")]] would be a synonym for env$foo?
absolutely not - environments can only be subscripted by name, not by logicals or integer subscripts - so I hope that most users would figure that one out > > I don't see why this would be nice: why not just use ls()? why? environments do get used, by many as vectors (well hash tables), modulo the restrictions on subscripting and the analogy is quite useful and should be encouraged IMHO. Robert > > Duncan Murdoch > >> --- a/src/main/attrib.c >> +++ b/src/main/attrib.c >> @@ -687,6 +687,8 @@ SEXP attribute_hidden do_names(SEXP call >> s = CAR(args); >> if (isVector(s) || isList(s) || isLanguage(s)) >> return getAttrib(s, R_NamesSymbol); >> + if (isEnvironment(s)) >> + return R_lsInternal(s, 0); >> return R_NilValue; >> } >> >> >> + seth >> >> -- >> Seth Falcon | Computational Biology | Fred Hutchinson Cancer Research Center >> http://bioconductor.org >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > -- Robert Gentleman, PhD Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M2-B876 PO Box 19024 Seattle, Washington 98109-1024 206-667-7700 [EMAIL PROTECTED] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
