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";

[download]

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

[download]

The m flag doesn't seem to so the trick. Have I missed something?

Cheers,

JohnGG

In reply to Re^2: Passing variables into regular expressions by johngg
in thread Passing variables into regular expressions by wanderer

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