I assumed from the example strings given that the positions of the characters within the strings was important. That is, "ABCXXXXXX" would be a good match, but "XABCXXXXX" would not.

If position is not important then my solution doesn't work at all. If my assumption was correct however, then using Algorithm::Diff::LCSidx to compare the pattern against the target string will work, but requires the additional step of checking to see if the contents of the two arrays of indices pointed to by the returned references are equivalent. Unless I missed something when skimming through the documentation that is.

Thanks, tye. Hanging out around here I definitely learn something new (usually several somethings) every day.

In reply to Re^2: How to use regular expression for this? (LCS) by AReed
in thread How to use regular expression for this? by davidz2f

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.