I could be misunderstanding something but I thought you had to use the s flag to get the regular expression to match across newlines. The following script
use strict;
use warnings;
my $str = "ab12c\nde34f\ngh56i\njk78l";
my @digits = $str =~ /(\d+)/g;
print "\@digits -- @digits\n\n";
my ($span_d) = $str =~ /(\d\d.*?\d\d)/;
print "\$span_d -- $span_d\n\n";
my ($span_m) = $str =~ /(\d\d.*?\d\d)/m;
print "\$span_m -- $span_m\n\n";
my ($span_s) = $str =~ /(\d\d.*?\d\d)/s;
print "\$span_s -- $span_s\n\n";
produces
@digits -- 12 34 56 78
Use of uninitialized value in concatenation (.) or string at reSorM li
+ne 12.
$span_d --
Use of uninitialized value in concatenation (.) or string at reSorM li
+ne 15.
$span_m --
$span_s -- 12c
de34
The m flag doesn't seem to so the trick. Have I missed something? Cheers, JohnGG
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|