Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Re: Understading array of hashes

by kennethk (Abbot)
on Apr 22, 2013 at 19:43 UTC ( #1029966=note: print w/replies, xml ) Need Help??

in reply to Understading array of hashes

warnings gives you a hint with: Useless use of hash element in void context at line 43. In your for loop, you never actually assign anything, so it is a no-op. You get something very close if you uncomment line 41, so you should probably just concentrate on how to modify your output. Essentially, if you don't want to output something, then don't print it:
my %hash; $hash{$_->{'type'}} {$_->{'name'}} = $_->{'reference'} for @$array; #$hash{$_->{'type'}}{ $_->{'name'} }for @$array; print "Results:\n"; for my $k1 (sort keys %hash) { print " $k1:\n"; for my $k2 (sort keys %{$hash{$k1}}) { print " $k2\n"; } }

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1029966]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (7)
As of 2017-01-19 22:09 GMT
Find Nodes?
    Voting Booth?
    Do you watch meteor showers?

    Results (172 votes). Check out past polls.