PERL Beginners - Printing a reference of an array

Author

Printing a reference of an array

Bryan Harris

2007-07-25, 6:59 pm

Hi,

I'm trying to figure out how to print the following array. How do I
print this type of thing? Please let me know if I'm posting to the
wrong list.

#!/usr/bin/perl

use strict;
use warnings;
use Data::Dumper;
use Getopt::Long;

my $name;
GetOptions('name=s@{1,}' => \$name);
print $name;

When I run the program I get the following results.

../getopts.pl --name bryan stephen robert
ARRAY(0x81308f4)%

I've tried several different ways of printing it, but with no luck so
far. Sometimes I get the following type of message, when I use
different variables like \$name[1], or other variations.

Global symbol "@name" requires explicit package name at ./getopts.pl line 10.
Execution of ./getopts.pl aborted due to compilation errors.

--
Bryan

Mr. Shawn H. Corey

2007-07-25, 6:59 pm

Bryan Harris wrote:
> Hi,
>
> I'm trying to figure out how to print the following array. How do I
> print this type of thing? Please let me know if I'm posting to the
> wrong list.
>
> #!/usr/bin/perl
>
> use strict;
> use warnings;
> use Data::Dumper;
> use Getopt::Long;
>
> my $name;
> GetOptions('name=s@{1,}' => \$name);
> print $name;
>
> When I run the program I get the following results.
>
> ./getopts.pl --name bryan stephen robert
> ARRAY(0x81308f4)%
>
> I've tried several different ways of printing it, but with no luck so
> far. Sometimes I get the following type of message, when I use
> different variables like \$name[1], or other variations.
>
> Global symbol "@name" requires explicit package name at ./getopts.pl
> line 10.
> Execution of ./getopts.pl aborted due to compilation errors.
>

You have to dereference the reference:

print @$name;

Or:

print @{ $name };

To access a member of the array, you use the arrow operator:

print "The first value is $name->[0]\n";

See `perldoc perlreftut` and `perldoc perlref` for more info.

--
Just my 0.00000002 million dollars worth,
Shawn

"For the things we have to learn before we can do them, we learn by doing them."
Aristotle

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