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Re^2: Using a regex capture as part of a varible

by nysus (Parson)
on May 07, 2020 at 14:49 UTC ( [id://11116546]=note: print w/replies, xml ) Need Help??


in reply to Re: Using a regex capture as part of a varible
in thread Using a regex capture as part of a varible

OK, good to know. My brain seems to have lost all knowledge of the 'e' modifier. Tried to get it to work with this simple example: 

my $new = 'blah';
my $string = 'asdfjkjl';
my $find = '(asd)';
my $replace = '$1' . $new;

replace ($string, $find, $replace);

sub replace {
  my $string = shift;
  my $left = shift;
  my $replace = shift;
  $string =~ s/$left/$replace/e;
  print $string;
}

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Still prints $1 in the output though. Adding 'ee' throws an error: "Bareword found where operator expected at (eval 1) line 1, near "$1blah"

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Re^3: Using a regex capture as part of a variable
by hippo (Bishop) on May 07, 2020 at 15:05 UTC

    You need to set up your replacement string correctly. Once that's done it runs fine with the /ee modifier:

    use strict;
use warnings;

use Test::More tests => 1;                      

my $new     = 'blah';
my $string  = 'asdfjkjl';
my $find    = '(asd)';
my $replace = qq#\${1} . '$new'#;

my $result = replace ($string, $find, $replace);

is $result, 'asdblahfjkjl';

sub replace {
    my $string  = shift;
    my $left    = shift;
    my $replace = shift;
    $string =~ s/$left/$replace/ee;
    return $string;
}

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