For what little it is really worth, you do not need the e modifier on this version ( as opposed to chromatic's suggestion ).

Both parts of the regex get double-quotish expansion, which will cause $hash{$1} to be expanded correctly.

The original problem was using the \1 as the backreference. That has been depricated since at least perl 5.004 ( maybe earlier, I cannot remember precisely ).

In fact, if you try to use the \1 on the command line and use perl -w, it will complain quite loudly. The moral here, of course, is make sure you use -w when developing code.

You also used the single quotes ('') around the variable, which would have prevented the \1 from being expanded even if \1 wasn't deprecated. Remember, single quotes mean literally and double quotes will do... well, double-quotish expansion.

Mik

In reply to RE: Re: hash problems by mikfire
in thread hash problems by zsh

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.