On Sun, Jun 14, 2009 at 11:59, Tech W.<tech...@yahoo.com.cn> wrote: > --- On Sat, 13/6/09, John W. Krahn <jwkr...@shaw.ca> wrote: >> When you say >> >> $scalar = (2, 5, 7, 9); >> >> you’re using the comma operator in scalar >> context, so it uses the >> scalar comma operator. > > Here, what is the "scalar comma operator"? > I can't understand for that. Thanks. snip
from perldoc perlop (or http://perldoc.perl.org/perlop.html#Comma-Operator) Binary "," is the comma operator. In scalar context it evaluates its left argument, throws that value away, then evaluates its right argument and returns that value. This is just like C’s comma operator. In list context, it’s just the list argument separator, and inserts both its arguments into the list. These arguments are also evaluated from left to right. The first of these two paragraphs describes the behaviour of the comma operator in scalar context. The second paragraph describes the behaviour in list context. -- Chas. Owens wonkden.net The most important skill a programmer can have is the ability to read. -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
