Hello monks,
I am posting this question in hopes of gaining some knowledge from someone that may have experimented with a solution for this at some point in their past. Also, I hope the responses will help other fellow monks when/if they seek this knowledge. I have over 100,000 files to look at, and each is a text file (.txt). What I want to do is reduce a lot of individual scripts that each perform their own REGEX against each file for a given phrase... into a single script that will do the same thing, but quickly, efficiently, and with something better than a loop through all the items or a huge REGEX with all the items (phrases) crammed one after the other. Ideally, I would like to use a hash of all the phrases being searched. I would like to know if there is a way to use a hash inside of a REGEX and make sure all the punctuation is understood (sorta like doing a quotemeta prior to running the regex). I am open to any method anyone has tested that they know will work. Over time, my list of files are going to grow and so are the phrases I will be searching for. I am guessing the phrases will increase into the thousands over time.

A sample phrase could be something like:
--->The cow jumped over the moon
-or-
--->110 Main Street, Huntington, AL, 55555

I sincerely appreciate any recommendations.

In reply to REGEX or Not to REGEX for many items by r1n0

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.