Tricky sorting of HOH.

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

I have the following hash:

my %hash_of_hashes=(
'A'=>{'param'=>9, 'number'=>1},  
'B'=>{'param'=>4, 'number'=>1}, 
'C'=>{'param'=>5, 'number'=>1}, 
'D'=>{'param'=>12, 'number'=>1},);
[download]

I need to print the thing out sorted on the value of "param" is there an easy clean way to accomplish this? Thank you for any help.

Comment on Tricky sorting of HOH. Download Code

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Re: Tricky sorting of HOH. by holli (Abbot) on Aug 25, 2006 at 13:19 UTC
`for ( sort { $hoh{$a}->{param} <=> $hoh{$b}->{param} } keys %hoh ) { print "$_\n"; }` [download] holli, /regexed monk/	[reply] [d/l]
Re: Tricky sorting of HOH. by imp (Priest) on Aug 25, 2006 at 13:24 UTC
Here's one way to do this: `use strict; use warnings; my %hash_of_hashes=( 'A'=>{'param'=>9, 'number'=>1}, 'B'=>{'param'=>4, 'number'=>1}, 'C'=>{'param'=>5, 'number'=>1}, 'D'=>{'param'=>12, 'number'=>1}, ); for my $key (sort {$hash_of_hashes{$a}{param} <=> $hash_of_hashes{$b}{ +param}} keys %hash_of_hashes) { print "$key\n"; }` [download] You might also find the following useful: Perl data structures cookbook - hashes of hashes Resorting to Sorting Sort::Maker	[reply] [d/l]
Re: Tricky sorting of HOH. by sen (Hermit) on Aug 25, 2006 at 13:32 UTC
Hi try this one, `print join("\n", sort { $hash_of_hashes{$a}->{param} <=> $hash_of_hash +es{$b}->{param} } keys %hash_of_hashes );` [download]	[reply] [d/l]