Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re: How to get Keys from hash having same value?

by Punitha (Priest)
on Jan 07, 2008 at 06:10 UTC ( #660764=note: print w/ replies, xml ) Need Help??


in reply to How to get Keys from hash having same value?

Hi isha,

If you want to manipulate the simple hash, then your hash will be like this,

my %myhash = ( 1 => 'a', 2=> 'b', 3=> 'a', 4=>'c');

To manipulate this simple hash, you can do like

use strict; my %myhash = ( 1 => 'a', 2=> 'b', 3=> 'a', 4=>'c'); for my $key (keys %myhash){ if($myhash{$key} eq 'a'){ print "KEY:$key\n"; } }

But you created the hash as

my %myhash = { 1 => 'a', 2=> 'b', 3=> 'a', 4=>'c'};

which is anonymous hash reference. To manipulate this hash reference, then you can do like

use strict; my $myhash = { 1 => 'a', 2=> 'b', 3=> 'a', 4=>'c'}; for my $key (keys %{$myhash}){ if(${$myhash}{$key} eq 'a'){ print "KEY:$key\n"; } }

Punitha

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://660764]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (7)
As of 2016-08-26 11:10 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    The best thing I ever won in a lottery was:















    Results (369 votes). Check out past polls.