Sorting Hash

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

Hi, I created this hash like this:

push @{$hash{$key}}, $val1, $val2, $val3
[download]

Now, I want to sort it based on the values of $val2, which is a number. I did this two years ago, lost the code, and know I need to do it again... woo is me. Can someone please refresh my memory?

Comment on Sorting Hash Select or Download Code

Replies are listed 'Best First'.
Re: Sorting Hash by Abigail-II (Bishop) on Aug 08, 2002 at 11:03 UTC
You can't sort a hash. I guess you mean you want the values to be sorted. `my @sorted = sort {$a -> [1] <=> $b -> [1]} values %hash;` [download] Abigail	[reply] [d/l]
Re: Sorting Hash by hotshot (Prior) on Aug 08, 2002 at 11:19 UTC
you can try `@keys = sort { $hash{$a} cmp $hash{$b} } keys %hash; # and by value` [download] this question is quite common, use the search engine first,next time. Thanks. Hotshot	[reply] [d/l]
Re: Sorting Hash by danboo (Beadle) on Aug 08, 2002 at 14:17 UTC
Since you're hash values are array refs, you need to access them as such: `my @sorted_keys = sort { $hash{$a}[1] <=> $hash{$b}[1] } keys %hash;` [download] - danboo	[reply] [d/l]