Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re: Hash Printing reveals Hash Memory Location

by tobyink (Abbot)
on Feb 03, 2012 at 01:04 UTC ( #951573=note: print w/replies, xml ) Need Help??


in reply to Hash Printing reveals Hash Memory Location

You have:

my %words = {};

You want:

my %words = ();

Or better yet:

my %words;

Essentially in that first line, you're adding an entry to the hash where the key is a reference to an anonymous second hash, and the value is undefined. Because you can't use references as hash keys, the reference is stringified (which looks like a memory location).

In other words, my %words = {}; is basically a shorthand for:

my %words; my $ref_to_anon_hash = {}; $words{ $ref_to_anon_hash } = undef;

Replies are listed 'Best First'.
Re^2: Hash Printing reveals Hash Memory Location
by perlStuck (Sexton) on Feb 03, 2012 at 01:08 UTC

    Ah. Thank you!

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://951573]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (1)
As of 2016-12-04 08:55 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    On a regular basis, I'm most likely to spy upon:













    Results (63 votes). Check out past polls.