RE: [FWP] IP address regex golf

["Brian L. Matthews" <blm@halcyon.com>]

>$f='(\d+)\.';/^$f$f$f(\d+)$/&($1|$2|$3|$4)<256

According to man inet on my ISP's Sun, the individual parts of the 
text version of an IP address can be specified in octal, hex, or 
decimal. If that's the case, none of the solutions presented really 
check for valid IP addresses, they only check for valid IP addresses 
with decimal parts (although most, like the one above, don't limit 
them to that as they allow leading zeroes).

Just a thought...
Brian

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