Hi Remy, On Thursday 29 Apr 2010 12:22:40 Remy Guo wrote: > I got the concept...but how to pass the reference? I'm really not familiar > with the reference....too bad. :( >
In addition to what Akhthar said, I'd like to note that we've concentrated a list of online resources to learn about Perl references, here: http://perl-begin.org/topics/references/ Please read some of them to learn more about references in Perl 5, because it's a very useful feature. Regards, Shlomi Fish > > > 2010/4/29 Akhthar Parvez K <akht...@sysadminguide.com> > > > Hi, > > > > On Thursday 29 Apr 2010, Remy Guo wrote: > > > I've got a problem in following script: > > > sub A { > > > > > > our %a; > > > $a{"fred"} = 1; > > > > > > ... > > > } > > > sub B { > > > > > > if ($fred != $a{"fred"}) { > > > > > > print "fred failed.\n"; > > > > > > } > > > if ($bella != $a{"bella"} { > > > > > > print "bella failed.\n"; > > > > > > } > > > > > > } > > > > > > The problem is, I made the hash %a in sub A but in sub B, the value in > > > > hash > > > > > %a is never read. The declaration "our" seems not effect. > > > Why?... > > > > Pass the hash reference as an argument while calling the function. Do > > remember that you can't pass the hash to a function, but just the hash > > reference. Also minimize (or even avoid) the use of declaring with "our", > > use argument passing instead. > > > > Regards, > > Akhthar Parvez K > > http://Tips.SysAdminGUIDE.COM <http://tips.sysadminguide.com/> > > > > UNIX is basically a simple operating system, but you have to be a genius > > to understand the simplicity - Dennie Richie > > > > -- > > To unsubscribe, e-mail: beginners-unsubscr...@perl.org > > For additional commands, e-mail: beginners-h...@perl.org > > http://learn.perl.org/ -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ http://www.shlomifish.org/humour/ways_to_do_it.html God considered inflicting XSLT as the tenth plague of Egypt, but then decided against it because he thought it would be too evil. Please reply to list if it's a mailing list post - http://shlom.in/reply . -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
