Do you know if there is a limit on the size that $regex can take? i.e. if the array is really big will it break things?
If you have a large word list, and you're trying to determine which of those words occur in a given text of arbitrary length, the best approach is likely to be to store the word list in a hash, then tokenize the text string; for each tokenized word in the string, if that word exists as a hash key, you've got a hit (append that word to your output list).

This way, you've got one simple loop over the "lexicon" (to store the word list as hash keys), and one loop over the word tokens in the text string; you're doing plain string comparisons (best to put everything in monocase) instead of regex matches, so it should be pretty quick.

In reply to Re^3: regex matching using arrays by graff
in thread regex matching using arrays by rsiedl

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.