On Sat, Dec 27, 2008 at 11:04, Mr. Shawn H. Corey <shawnhco...@magma.ca> wrote: snip > Perl does not have true constants. What `use constant` does is create a > sub that returns the value. That means you can use it as a sub in all > your code. snip
Just out of curiosity, what is your definition of a "true constant"? Perl provides a better mechanism for constant scalars: the SvREADONLY flag. When this flag is set any attempt to modify the value of the scalar throws a runtime error. Accessing the SvREADONLY flag is a bit hard, which is both a blessing and a curse; however, the Readonly module* gives you the ability to set the flag, but not clear it (which is a good thing). * only if you have Readonly::XS installed, otherwise it uses a tied variable that throws an error when STORE is called. -- 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/
