If you just change those single quotes to double quotes, then the value of $1 from the previous pattern will be interpolated before the next substitution ever happens. If you really want the "variable pattern" to behave the same as the "static pattern", you may want to do something like this: 
$newname = 'foo-64-bar';
$oldpat = '-([0-9]+0-';
$newpat = q/'_'.$1.'_'/;
$newname =~ s/$oldpat/$newpat/ee;
print "variable patterns: $oldname becomes $newname\n";

[download]
That's two /e modifiers, and it's not particularly pretty, but it works. I'm sure there's probably a better way, though. :-)

-- Mike

--
just,my${.02}

In reply to Re: Re: s/// ignoring subexpressions with variable replacement patterns by thelenm
in thread s/// ignoring subexpressions with variable replacement patterns 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.