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Re^2: Net::Dns::packet creation.

by cord-bin (Friar)
on May 26, 2014 at 14:18 UTC ( #1087439=note: print w/replies, xml ) Need Help??

in reply to Re: Net::Dns::packet creation.
in thread Net::Dns::packet creation.

shadrack gave a good answer by using gethostbyaddr with the pack function to no use the Socket module which is tricky.
We normally would do :
#!/usr/bin/perl use Socket; #Resolve IP address into hostname sub ReverseLookup { my(@addrs,$xname,$xaliases,$xtype,$xlen,$addr); # @addrs=split(/\./,$_[0]); # $addr=pack('c4',@addrs[0..3]); # c or C - A signed/unsigned char +(8-bit integer) value $addr = inet_aton($_[0..3]); ($xname,$xaliases,$xtype,$xlen,@addrs)=gethostbyaddr($addr,2); return $xname; }
We don't know why MonkeyManChfKiller don't want to use modules, it's his choice but obviously this can be achieved in another way with perl.
Nice use of pack() which I don't see very often.

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[james28909]: yep, i am scraping a websites date/time stamp from an article. none of that is relevant though because the strings i get are as expected. the returned data from the website is the list of @weekdays
[james28909]: i need to convert those @weekdays to an numerical date based off of scalar localtime
[james28909]: i have thught about this and though about it lol
[james28909]: also remember, that if 'Today' is may 1, then Yesterday is not may 31 lol
[james28909]: theoretically speaking ofcourse
[james28909]: so if you subtracting as you loop, be aware that you will eventually be subtracting into a past month, or year <.<
[james28909]: dontcha love it!

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