regex - perl $ anchor failed to match end of line -

example: my $pattern = "mkdir &"

as can see, patterns commands , want pattern match "&+eol" distinguish whether command runs on background or not.

i tried /&$/, /&\$/ failed.

what wrong? suggestion pattern match?

45: if ($command =~ /&$/) {

db<2> p $command

mkdir &

db<3> s

54: print $_;print "\n";

your pattern works fine

use strict; use warnings 'all'; use feature 'say';  $pattern = 'mkdir &';  $pattern =~ /&$/ ? 'match' : 'no match'; 

output

match 

it impossible tell question, have whitespace @ end of string trying match. perhaps have space or linefeed there, or perhaps processing file has originated on windows , have removed lf, leaving terminating cr.

you can fix adding optional whitespace @ end of regex pattern, this

say $pattern =~ /&\s*$/ ? 'match' : 'no match'; 

you can see string contains using data::dumper, this

use data::dumper; $data::dumper::useqq = 1;  print dumper $pattern; 

in instance produces $var1 = "mkdir &";, , able see if there superfluous characters after &.