Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
chromatic,
The rest of that two line paragraph you omitted reads: Think for yourself and make sound judgements.

Let me make it clear that I am not suggesting these rules don't exist for good reason or that following them is not a good idea. My point was that the exceptions are not universal and that careful experimentation results in experience to know what to follow and when. Being careful requires the coupling of common sense and prudence.

Unless you're writing an e-mail address parser...

In my meditation, I state that while looking for the things that could go wrong (prudence), you will need to utilize your situation specific context to know how, if at all, to apply this information. So what are my existing wheels for parsing email addresses:

All but the last deal with RFC-822 and/or RFC-2822. These would be useless if the purpose I was parsing was to find addresses attempting to expliot an open-relay. This is because addressesses such as foo@bar.com%blah.net are valid by the RFC but result in the vulnerable MTA responsible for the blah.net MX record in stripping off the %blah.net and redirecting the message for foo@bar.com.

Ok, so I use Data::Validate::Email which supports RFC 822 addresses but has "real-world" flavor as well. This still we do me no good if my objective is to find addresses that fit a specific pattern. It is a case of the general purpose tool not working for the specific problem space.

I have updated the original meditation with a closing paragraph and provided a reply that I believe helps explain my position.

Cheers - L~R


In reply to Re^2: Breaking The Rules by Limbic~Region
in thread Breaking The Rules by Limbic~Region

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (20)
    As of 2014-10-02 14:32 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      What is your favourite meta-syntactic variable name?














      Results (61 votes), past polls