On Wed, Mar 20, 2013 at 12:38 PM, Janko Thyson <janko.thyson.rst...@googlemail.com> wrote: > Dear list, > > I came across a behavior that IMHO is somewhat undesired when calling > '$field()': > If the field name whose value you're trying to get is *not* a valid > field of the Reference Class, then R doesn't stop there with an error, > but scans through all enclosing environments/frames. The result is > something similar to calling '|get(<objname>, inherits=TRUE)|' when > you'd actually expect something like ' get(<objname>, inherits=FALSE)' > to be the default (at least I do) in order to avoid undesired retrieval > results. > > Here's a little illustration of the behavior: > http://stackoverflow.com/questions/15529251/avoiding-consideration-of-enclosing-frames-when-retrieving-field-value-of-a-s4-r
Note that that behavior is documented in ?setRefClass : $field(name, value) With one argument, returns the field of the object with character string name. With two arguments, the corresponding field is assigned value. Assignment checks that name specifies a valid field, ** but the single-argument version will attempt to get anything of that name from the object's environment. ** -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
