On 15.02.2011 22:48, David Scott wrote:
On 16/02/2011 7:04 a.m., Paul Johnson wrote:
...
4. We don't want gratuitous use of "return" at the end of functions.
Why do people still do that?
Well I for one (and Jeff as well it seems) think it is good
programming practice. It makes explicit what is being returned
eliminating the possibility of mistakes and provides clarity for
anyone reading the code.
David Scott
AFAIR (but I am not sure, maybe some expert can comment on this), there
is a difference between using return and not using return when R code is
called from C-code via eval(). If my memory is correct, a return()
statement (in the R code) would abort the C function (which is trying to
evaluate the R code, e.g., the body of a function) as well, which is
probably not intended. So, the use of return() in R code may be quite
disadvantageous in certain situations.
Martin
--
Dr. Martin Becker
Statistics and Econometrics
Saarland University
Campus C3 1, Room 217
66123 Saarbruecken
Germany
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