my $tmpname = "$filename.$$.tmp";
my $changes = 0;
- $search = $replace if not defined $search;
+ $search = $replace if @_ < 3;
# generate a single regex to emulate smart match
$search = [$search] unless ref $search eq 'ARRAY';
- $search = join('|', map { ref $_ ? $_ : "^\Q$_\E\$" } @$search);
+ @$search = grep { defined } @$search;
+ $search = @$search ? join('|', map { ref $_ ? $_ : "^\Q$_\E\$" } @$search) : undef;
open my $src, '<', $filename;
open my $dest, '>', $tmpname;
while (readline $src) {
chomp;
- if ($_ =~ /$search/s) {
+ if (defined $search and $_ =~ /$search/s) {
if (ref $replace eq 'ARRAY') {
if (@$replace and $_ eq $replace->[0]) {
shift @$replace;