Thanks, that kickstarted my brain.
I'm too old-school to do it your way but I did it this way in the end:
sub get_filehandle {
my $self = shift;
$self->{file} = shift;
open( my $fh, '<', $self->{file} )
or die "can't open $self->{file}";
return $fh;
}
sub get_lines {
my $self = shift;
$self->{file} = shift;
### get the filehandle if we don't already have one
unless ( $self->{file_handle} ) {
$self->{file_handle} = $self->get_filehandle( $self->{file} );
}
if ( my $line = readline( $self->{file_handle} ) ) {
return $line;
} else {
return;
}
}
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