Why doesn't R have one, like "." in Perl or juxtaposition in awk?
It does not seem impossible to introduce one, if that would be
reasonable. It would seem to involve adding a table entry to
main/names.c for the binary operator and a corresponding internal
function, say do_dot(). This cannot be simply do_paste(), since
the implied separator is "". So, do_dot() might be similar, but
if it finds a non-string operand, a syntax error would be issued,
in place of the message from do_paste() noting a bad *argument*.
Precedence must be decided, but it may not matter. For example,
"a" . "b" + 1
If . precedes +, then a syntax error results, after "a" . "b" is
computed. If + precedes ., then an error happens, just earlier.
What else, or is this a dumb idea?
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
