Re^2: Sorting Hash / Array


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Re^2: Sorting Hash / Array

by nickt9999 (Acolyte)

on May 17, 2012 at 16:09 UTC ( [id://971102]=note: print w/replies, xml )

Need Help??

in reply to Re: Sorting Hash / Array
in thread Sorting Hash / Array

Hi Chris

I Have a bit of an issue in that it doesn't seem to sort subnets correctly.

10.182.8.0/26         
10.182.8.0/21         
10.182.8.64/26         
10.182.8.128/26         
10.182.8.192/26
[download]

10.182.32.0/24         
10.182.32.0/19         
10.182.33.0/24
[download]

I would expect 10.182.8.0/21 to be before 10.182.8.0/26

Could you help?

Thanks

Nick

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Re^3: Sorting Hash / Array
by johngg (Canon) on May 21, 2012 at 09:45 UTC

Split the network and netmask into separate terms and sort on netmask within network.

knoppix@Microknoppix:~$ perl -MSocket -Mstrict -wE '
my @networks = qw{
   10.182.8.0/26
   10.182.8.0/21
   10.182.8.64/26
   10.182.8.128/26
   10.182.8.192/26
   };

say for
   map  { $_->[ 0 ] }
   sort { $a->[ 1 ] cmp $b->[ 1 ] || $a->[ 2 ] <=> $b->[ 2 ] }
   map  { my( $network, $netmask ) = split m{/};
          [ $_, inet_aton( $network ), $netmask ];
        }
   @networks;'
10.182.8.0/21
10.182.8.0/26
10.182.8.64/26
10.182.8.128/26
10.182.8.192/26
knoppix@Microknoppix:~$
[download]

I hope this is helpful.

Cheers,

JohnGG

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