Monks,
I am having trouble determing what this regular expression does:
[ split /\s+/ ] if /^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3+})/;
}
This was posted by
ar0n in my node
Automating Firewall Log Reporting. I "msg" ar0n for clarification, but he either didn't get it or was too busy to respond. Instead of feeling like a nuisance to him, I figure another monk would be able to help me.
This matches correctly, but I can't figure out what it is doing. The way I understand it, it is splitting on one or more whitespaces and matching anything that is NOT a digit between one to three characters long? This is where I am confused because the ip addresses range from 1-255 and I would think this does fall into the spectrum.
TIA
Dru
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.