(Please put your code in <c>...</c> tags. It'll handle escaping the necessary character and it'll place the line breaks for you.)

There's a lot of needless work here. Perl code and regexs are being parsed and compiled over and over again. Also, there's no reason to use /o anymore. It does nothing more than complicate things.

my %chartran = (
   "\xE1" => 'aacute',
   "\xE2" => 'acirc',
   "\xE4" => 'auml',
   "\xC0" => 'Agrave',
   "\xC1" => 'Aacute',
);

my $re = '[' . (join '', keys %chartran) . ']';
$re = qr/$re/;

while (<VRUN>) {
    s/($re)/$chartran{$1}/g;
    print;
}

[download]

Of course, you could simply use core module HTML::Entities's encode_entities method. 

use HTML::Entities qw( encode_entities );

while (<VRUN>) {
    print encode_entities($_);
}

[download]

In reply to Re: large hash of regex substitution strings by ikegami
in thread large hash of regex substitution strings by scodes

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.