I have a question about reference classes, which someone here
undoubtedly can answer immediately, saving me hours of wading through
indecipherable internal code. :-) Thanks in advance.
Reference class data is mutable, fine, but in what sense? Is it really
physical, or is it just a view given
It's a bit of a simplification, reference classes are wrappers around
environments. So if modifying a value in an environment would create
a copy, then modifying the same value in a reference class will also
create a copy.
The situation with modifying a vector is a bit complicated as it will
some
Bottom line: Really no different from the case of ordinary vectors that
are not in reference classes, right? In other words, not true
pass-by-reference.
Norm
On Thu, Jan 09, 2014 at 04:43:44PM -0600, Hadley Wickham wrote:
> It's a bit of a simplification, reference classes are wrappers around
On Jan 9, 2014, at 6:20 PM, Norm Matloff wrote:
> Bottom line: Really no different from the case of ordinary vectors that are
> not in reference classes, right? In other words, not true pass-by-reference.
>
The pass-by-reference applies to the object itself, not necessarily to anything
you
Thanks, Hadley and Simon.
The reason I asked today was that when reference classes first came out,
it had appeared to me that there is no peformance advantage to using
reference classes, that it was mainly a style issue (encapsulation,
etc.). Unless I'm missing something, both of you have confir
On 01/09/2014 07:53 PM, Norm Matloff wrote:
Thanks, Hadley and Simon.
The reason I asked today was that when reference classes first came out,
it had appeared to me that there is no peformance advantage to using
reference classes, that it was mainly a style issue (encapsulation,
etc.). Unless
I guess I should explain where I'm coming from in all this.
I've always been something of a skeptic on object-oriented programming.
Though I agree it has some advantages, and I do use it myself (in
Python), in general I think it makes one work far too hard for the
potential benefit. C++ template
