Ivan Krylov <krylov.r...@gmail.com> wrote:
> FWIW, Perl5 has a separate string concatenation operator (".") in order
> to avoid potential confusion with addition. So do Lua (".."), SQL
> ("||", only some of the dialects) and Raku ("~", former Perl6).
Indeed, using the same operator '+' for addition and string concatenation is
not a great idea in my opinion.
Accidental character arguments to a '+' that meant to be a numerical addition
would go undetected. Bug tracking would be harder in that case.
R is already too permissive: it finds some interpretation of most probably
buggy code, such as ifelse() on vectors of unequal length or '[' operator with
only one argument to index a matrix. I would not want to add new permissive
behaviors.
A new operator, dedicated to string concatenation, such as %+% or %.%, would be
better, in my opinion.
--
Sincerely
Andr� GILLIBERT
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