On Fri, 13 Mar 2009, William Dunlap wrote:
Would it make anyone any happier if the manual said
that the replacement functions should not be called
in the form
xNew <- `func<-` (xOld, value)
and should only be used as
func(xToBeChanged) <- value
?
That was my reaction, too. The discussion reminded me of old comp.lang.c
threads about i=i++ and similar issues. The anomalies in
xNew <- `func<-` (xOld, value)
arise precisely because it isn't supposed to be used that way.
My other proposal for 'rigidly defined areas of doubt and uncertainty' has been
the evaluation order of the *apply family (eg, does apply process the columns
left to right, or right to left, or however it feels like?).
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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