Hello catfish1116,

Other monks have shown you where the problem lies, but (strangely) no-one has made the fix explicit: change the regular expression from /^barney/m to /^\s*barney/m. This says: match any line beginning with zero or more whitespace characters followed by “barney”.

Perhaps it will make things a little clearer if we break the string into lines, and apply the regex to each line in turn:

use strict;
use warnings;

my $para = 'This is a wilma line
         barney is on this line
         but this line ends with fred
         ** this line has barney in the middle **
         and a final dino line';

my $count = 0;

for my $line (split /\n/, $para)
{
    printf "line %d: >%s< -- barney %sfound\n", ++$count, $line,
            $line =~ /^\s*barney/ ? '' : 'not ';
}

[download]

Output:

13:49 >perl 1958_SoPW.pl
line 1: >This is a wilma line< -- barney not found
line 2: >         barney is on this line< -- barney found
line 3: >         but this line ends with fred< -- barney not found
line 4: >         ** this line has barney in the middle **< -- barney 
+not found
line 5: >         and a final dino line< -- barney not found

13:49 >

[download]

(Of course, when we know we’re dealing with a single line at a time, the /m modifier is no longer needed on the regex.)

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re: matching problem by Athanasius
in thread matching problem by catfish1116

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