A thread on r-devel ("Historical NA question") went (finally) off-topic,
heading towards "Precedence". This triggered a question that I think is
better put on this list:
I have been more or less regularly been writing programs since the
seventies (Fortran, later C) and I early got the habit of using
parentheses almost everywhere, for two reasons. The first is the
obvious, to avoid mistakes with precedences, but the second is almost as
important: Readability.
Now, I think I have seen somewhere that unnecessary parentheses in R
functions may slow down execution time considerably. Is this really
true, ant should I consequently get rid of my faiblesse for parentheses?
Or are there rules for when it matters and doesn't matter?
Thanks, Göran
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