=~ m/^$path1|$path2|...etc/

I know LanX and kcott understand this, but here's a general side note. In a regex expression like the one quoted above, the ^ anchor is associated only with the first alternation, i.e., ^$path1. None of the other alternations are anchored.

The "precedence" of Perl ordered alternation is very low. This applies generally, so in
    $str =~ m/ a b c | d | e | f g h /x;
the regex pattern "atoms" a b c comprise the first possible alternation, then d if the first alternation cannot match, then e, then the f g h sequence.

Use grouping, typically non-capturing, to disambiguate precedence. E.g., in
    $str =~ m/ a b (?: c | d e | ... | etc) f g /x;
the sequence a b is required for a match, then the first of c or d e or ... or etc, then the required f g sequence.

Give a man a fish:  <%-{-{-{-<

In reply to Re^3: In place replacement from reference list by AnomalousMonk
in thread In place replacement from reference list by Misstre

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.