Fellow Monks,

Two questions:

1.) I have a bunch of ip addresses saved to a hash, with the ip being the hash key. I would like to know those networks (Class C's) that have the last octet in a sequential order from 0.255. For example: 
192.168.1.0
192.168.1.1
192.168.1.2
.
.
192.168.1.255

[download]
I honestly can not think of an easy way to do this. The only thing I can think of is have 255 if statements and if they all match, I have what I am looking for. I know this is just asinine and I would rather jump off the nearest bridge.

2.) Since I am trying to expand my limited knowledge of map and grep functions, I would be most gratefull if someone could post a solution using either or both of those, which from what I understand of them is probably my best choice.

The closes I can get with grep is the following: 
my @segments = grep {/^(\d{1,3}\.\d{1,3}\.\d{1,3})/} keys %hashIPs;

[download]
Although this saves the entire ip, rather then the first three octets, which is what I am after. Is it possible to save $1 with grep?


Thanks,
Dru

Perl, the Leatherman of Programming languages. - qazwart

In reply to Matching Sequential IP Addresses by Dru

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