It's all in the context. If that line of code is part of a vector algebra program, in a subroutine called "rotate_vector", and the names of the variables suggest that they might be vectors, it should be pretty obvious what the dot means. ;-) But yep, in some other context it might be confusing.
in reply to Re^3: Things I Don't Use in Perl
in thread Things I Don't Use in Perl