is there a simlple possibility to get also the string in index in case of a match
Not that I can immediately think of. Less simple techniques depend on whether you expect most lines to match at least one of the strings, or for most lines to be rejected. If the latter, then you can use my suggested join'|' technique to quickly reject most lines, then use a slower technique only on the matching lines to find which string matched. For example you could generate a second pattern which includes captures, e.g. /(string1)|(string2)|..../ and apply it to matched lines, then see what is the first non-undef value out of $-[1], $-[2], .., $-[N]. This pattern is less efficient than /string1|string2|.../ as it isn't internally compiled into a trie and thus has to check every string in in turn, which is slow for many strings.

Dave.

In reply to Re^3: convert string into a match pattern by dave_the_m
in thread convert string into a match pattern by Anonymous Monk

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.