[R] Question on closure (lexical scoping) and encapsulation
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Wed Jun 14 17:45:13 CEST 2000
murdoch at stats.uwo.ca (Duncan Murdoch) writes:
> It's also rather cumbersome to extract a member from an environment,
> you need the "get" function. It would probably make sense to overload
> $ to work on environments, so that instead of Doug Bates' code
> get("total", env = environment(ross$balance))
> you could just type
> Print methods for environments would be nice; these should do an ls()
> of the environment and say what the parent environment is.
...both of which are (almost) possible already in 1.1.0 if you attach
a class attribute:
 "$.environment" "$.foo" "print.environment"
 "print.foo" "x"
The print.environment and print.foo forms don't work. That would
require dispatch on the data class of the argument.
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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