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How do I sort a file with IP Addresses and another text column?

by arv (Initiate)
on Jun 14, 2001 at 08:35 UTC ( #88295=categorized question: print w/replies, xml ) Need Help??
Contributed by arv on Jun 14, 2001 at 08:35 UTC
Q&A  > sorting


The format of the file is like this:,,USA,,USA,,Argentina
I need to sort the file based on IP Address, country wise
How can I do this?

Answer: How do I sort a file with IP Addresses and another text column
contributed by tadman

use Socket qw [inet_aton]; sub squish { my($ip_lo,$ip_hi,$name) = split (//,$_[0]); return $name.inet_aton($ip_lo).inet_aton($ip_hi); } @sorted = sort { squish($a) cmp squish($b) } @unsorted;
The inet_aton function returns four bytes, the value of the IP address in network order, which sorts properly using an ASCII sort. The Socket module is standard with Perl.
Answer: How do I sort a file with IP Addresses and another text column
contributed by I0

print map{sprintf(("%d.%d.%d.%d,"x2)."%s\n",(split/,/)[1..8,0])} sort map{sprintf"%s".",%3d"x8,(split/\W/)[8,0..7]} <DATA> __DATA__,,USA,,USA,,Argentina

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