Re: Sorting a hash by value, and displaying the key

[rob chanter]

On Thu, May 31, 2001 at 02:41:32PM -0500, David Michael wrote:
> Hello,
>     I have a hash that needs to be displayed in a certain order. I tried
>     
>     foreach $key (sort (keys %HASH)) {
>         print $key;
>     }
> 
>     that sorts alphabetically. I need it in the order it was inserted, so I made the 
>value a number that increased for each key. I need to sort by the value, but display 
>the key. Any ideas ?

You want something like

foreach $value(sort {$a <=> $b} (values(%hash)){
        print $value;
}

The {$a <=> $b} thing is an anonymous subroutine that specifies a
numeric sort. You could also do

foreach $value(sort byNum (values(%hash)){
        print $value;
}

sub byNum {
        $a <=> $b;
}

"perldoc -f sort" ought to help if you need more info.

cheers
rob c