On 22 April 2010 01:26, Norman Gaywood <ngaywood@xxxxxxxxxx> wrote:
> On Wed, Apr 21, 2010 at 04:12:06PM +0100, Dan Track wrote:
>> On Wed, Apr 21, 2010 at 1:30 PM, Norman Gaywood <ngaywood@xxxxxxxxxx> wrote:
>> > On Wed, Apr 21, 2010 at 09:21:30AM +0100, Dan Track wrote:
>> >> hashes. It's after this that I'm stuck, I'm struggling to order the
>> >> hash of hashes by uid and then print the ordered list out? Can someone
>> > [snip]
>> >> foreach my $sorted ( sort { $HoH->{$a}{uid} cmp $HoH->{$b}{uid} } keys %HoH)
>> >
>> > cmp is a string comparison. You probably want to sort numerically on the
>> > uid. So replace 'cmp' with '<=>'
>
>> foreach my $sorted ( sort { $HoH{$a}->{"uid"} <=> $HoH{$b}->{"uid"} } keys %HoH)
>> {
>> print STDOUT "$HoH{$sorted}\n"
>> }
>
>> and all I get out is:
>>
>> perl sort.pl
>> HASH(0x89de3d0)
>> HASH(0x8a05d40)
> [snip]
>
> $HoH{$sorted} is a reference to a hash. $HoH{$a}{uid} (or in
> long hand $HoH{$a}->{"uid"}) should print out the uid numbers.
That should be $HoH{$sorted}{uid}
--
Norman Gaywood, Computer Systems Officer
University of New England, Armidale,
NSW 2351, Australia
ngaywood@xxxxxxxxxx Phone: +61 (0)2 6773 3337
http://mcs.une.edu.au/~norm Fax: +61 (0)2 6773 3312
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