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Printing slice of anonymous hash within hash

by nysus (Parson)
on Jul 05, 2001 at 11:17 UTC ( [id://94028]=perlquestion: print w/replies, xml ) Need Help??

nysus has asked for the wisdom of the Perl Monks concerning the following question:

Slices of anonymous data structures within hashes/array are still kicking my butt. This time I've got an anonymous hash within a hash and I'm wondering how to print out a slice of the anonymous hash like so: 
print @visits{$key}->{'ip', 'last_time'}; # this doesn't work
print @visits{$key}{'ip', 'last_time'}; # nor this


Out of desperation, I've also tried:
%$visits{$key}{'ip', 'last_time'}
%@visits{$key}{'ip', 'last_time'}
@@visits{$key}{'ip', 'last_time'}
@$visits{$key}{'ip', 'last_time'}
...and the above with an infix operator.

[download]
As always, any help for my sorry a** is greatly apprciated. Thanks!

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Replies are listed 'Best First'.
Re: Printing slice of anonymous hash within hash
by ariels (Curate) on Jul 05, 2001 at 11:25 UTC
    Your problem is that (syntactically speaking) your slice happens before you get a chance to dereference.

    Try adding braces, like this: 

    %x = (
  abc => { ip => v1.2.3.4, last_time => 'today' },
  def => { ip => v5.6.7.8, last_time => 'yesterday ' },
);

@y = @{$x{def}}{'last_time', 'ip'};

    [download]
[reply]
[d/l]
Re: Printing slice of anonymous hash within hash
by btrott (Parson) on Jul 05, 2001 at 11:23 UTC 
        @{ $visits{$key} }{'ip', 'last_time'};

    [download]
[reply]
[d/l]

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