Oh, you want to recognize words. You know, you don't have to leave the ASCII realm to realize that that is more tricky than just matching letters and not matching punctuation symbols. Not matching punctuation symbols means rejecting "don't" as a word.

As for matching Unicode letters, we have: 

    "ญᴥ一ךى" =~ /^\p{L}+$/
which is a sequence of (Unicode) letters, but from 5 different scripts. Do you want to match that?

And then I haven't touch the can of worms called 'combining sequences'. Many (all?) of the accented Unicode characters can also be formed by taking the base character, and adding the various decorations to them. Not to mention that most combinations of a base character and decorations don't have a Unicode code point, and will have to be made by combining sequences.

In reply to Re^3: Unicode regular expressions by JavaFan
in thread Unicode regular expressions by SilasTheMonk

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.