Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much

Re: Parsing hash reference as argument for subroutine

by Eily (Vicar)
on Jan 06, 2014 at 11:54 UTC ( #1069493=note: print w/replies, xml ) Need Help??

in reply to Parsing hash reference as argument for subroutine

You should use strict and warnings, it would have helped you avoid some trouble.

$matrix is not declared, you should have a my $matrix = {}; at the beginning of the function. This function does not return $matrix. But then again, there are three { block opener but only two } block ends, this doesn't even compile.

To see what's inside a nested data structure (like a hash of hashes), you can use Data::Dumper like this :

use Data::Dumper; #At the top of the file ... print Dumper $P;

And at last, you probably want to read perldsc

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1069493]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (9)
As of 2016-10-27 09:47 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (357 votes). Check out past polls.