No, although I can see why my examples would lead one to think that. Doh. :(

My question is really more about testing for the effects of awk. Since awk by default splits lines on whitespace, if I were to cat a file that contained a line that looked like MY_IP = 123.134.234.90, and then do  |awk '{print $1;}', I'd only get the "MY_IP" part.

So, in order to see what I would be losing by doing that, I decided to try and write a regex that would show me lines that contained an IP address, but only after the first whitespace on the line, which itself needed to follow some non-whitespace stuff, that did not itself contain an IP address.

This turns out to be difficult to do by hand, but easy if you use regex modules, as shown below by AnomalousMonk :D

In reply to Re^2: Seeker of Regex Wisdom (strings which don't form specific patterns) by ilcylic
in thread Seeker of Regex Wisdom (strings which don't form specific patterns) by ilcylic

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.