wa2nlinux:

I assume the part you're having trouble with is getting the regular expression into a variable and treating it as a regular expression instead of a string. If you read perldoc perlop in the section on "Quote and quote-like operators", you'll find the subsection "Regex Quote-Like Operators" which will help you.

Basically the trick is this: Once you get the regex into a string, you can use the qr operator to turn it into a reference to a regex that you can use just like a regular expression:

$ cat regex_in_str.pl
#!/usr/bin/perl
use strict;
use warnings;

my $r = "ab+c*d";
my $rRegex = qr/$r/;

for my $t (qw( abcd aabbbd acccd dbca )) {
    if ($t =~ $rRegex) {
        print "MATCH: $t\n";
    }
}

$ perl regex_in_str.pl
MATCH: abcd
MATCH: aabbbd

$

[download]

So all you need to do is read the name and representation of your regular expression from a file, convert the representation into a reference to a regex and load your array.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

In reply to Re: Find Replace text with list by roboticus
in thread Find Replace text with list by wa2nlinux

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.