sorting a hash

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

Monks,

This seems to be a simple question but one I have not found an answer for in the monastery.

I want to sort a hash from highest to lowest value.

For example:


%hash = (
5.764 => a,
3.24 => b,
4.6 => c);
[download]

I would want this to print out as:

5.764 a

4.6 c

3.24 b

Thanks,

Comment on sorting a hash Download Code

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Re: sorting a hash by Samy_rio (Vicar) on Feb 28, 2006 at 12:51 UTC
Hi, Try this, `use strict; use warnings; my %hash = ( 5.764 => 'a', 3.24 => 'b', 4.6 => 'c'); print "$_\t$hash{$_}\n" for reverse sort keys %hash; __END__ 5.764 a 4.6 c 3.24 b` [download] You should view How (Not) To Ask A Question. Regards, Velusamy R. eval"print uc\"\\c$_\""for split'','j)@,/6%@0%2,`e@3!-9v2)/@\|6%,53!-9@2~j';	[reply] [d/l] [select]
Re^2: sorting a hash by fishbot_v2 (Chaplain) on Feb 28, 2006 at 13:00 UTC
The OP doesn't state this clearly, but I assume that he means numerically sorted, rather than lexically. `print "$_\t$hash{$_}\n" for reverse sort { $a <=> $b } keys %hash; # or simply print "$_\t$hash{$_}\n" for sort { $b <=> $a } keys %hash;` [download]	[reply] [d/l]
Re: sorting a hash by mickeyn (Priest) on Feb 28, 2006 at 12:52 UTC
From your expected output you probably meant sorting the keys and not the values of the hash. `foreach ( sort {$b <=> $a} keys %hash ){ print $_," ",$hash{$_},"\n"; }` [download] should answer your question (decending numeric key sorting). Enjoy, Mickey	[reply] [d/l]
Re: sorting a hash by Fletch (Bishop) on Feb 28, 2006 at 13:45 UTC
See also `perldoc -q sort`.	[reply]
Re: sorting a hash by ashokpj (Hermit) on Feb 28, 2006 at 14:50 UTC
`use strict; use warnings; my %hash = ( 23=> "er",3.5 =>"rt", 56=>"ssd",7=>"ert"); print "$_:-:$hash{$_}\n" for sort {$b <=> $a} keys %hash;` [download] To learn more about sorting go through following site http://www.perlfect.com/articles/sorting.shtml	[reply] [d/l]
Re: sorting a hash by Jasper (Chaplain) on Feb 28, 2006 at 14:29 UTC
Funny, I typed 'sort hash' into the text box in the top left hand corner of this page, and got a load of relevant results. Perhaps the search facility was broken when you tried to find an answer for this.	[reply]