Much good info from cowboy, Roy J. et al.

And if the code you posted is merely an attempt to show us concisely your desire, please ignore this... but if it's reflective of your actual plan of attack, the reference to "dynamically" suggests (to me, anyway) that you need to think thru the meaning of "dynamically" or maybe provide a different term which reflects your actual intent.

The elements of the regex -- $wday, $mon, $mday and $year -- are hard coded here. Only if you actually intend to get their values from STDIN or somesuch, this would qualify (in my book, which may not be yours) as "dynamic."

and suggest perlretut and perlrequick for more on regexen.

In reply to Re: string substitution within regular expressions? by ww
in thread string substitution within regular expressions? 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.