I'm a novice when it comes to regexen so I'm hoping someone can tell me if I've left out anything, TIMTOWTDI, etc. As you can see I've tested the few things I could think of but I'm afraid that I might have missed something. I found some hideous ugly code using for (;;), substr and index that this will replace. The string must consist of two uppercase Alpha characters, no more, no less. This is a small snippet in a program that someone else has asked to look at. Thanks! 
use strict;
my @strs = ('ABC','aZ','CC','AZ','ZZ','?A','W1','A ','  ','..','A','1'
+,'');
foreach (@strs) {
   if (/^[A-Z]{2}$/) {
      print "PASS: ";
   } else {
      print "## FAIL: ";
   }
   print "'$_'\n";
}

[download]

--Jim

In reply to Simple Regex for Alpha string by jlongino

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.