DirHandle - (obsolete) supply object methods for directory handles
# recommended approach since Perl 5.6: do not use DirHandle if (opendir my $d, '.') { while (readdir $d) { something($_); } rewind $d; while (readdir $d) { something_else($_); } } # how you would use this module if you were going to use DirHandle; if (my $d = DirHandle->new(".")) { while (defined($_ = $d->read)) { something($_); } $d->rewind; while (defined($_ = $d->read)) { something_else($_); } }
There is no reason to use this module nowadays.
The DirHandle method provide an alternative interface to the opendir(), closedir(), readdir(), and rewinddir() functions.
DirHandle
Up to Perl 5.5, opendir() could not autovivify a directory handle from undef, so using a lexical handle required using a function from Symbol to create an anonymous glob, which took a separate step. DirHandle encapsulates this, which allowed cleaner code than opendir(). Since Perl 5.6, opendir() alone has been all you need for lexical handles.
undef
To install vars, copy and paste the appropriate command in to your terminal.
cpanm
cpanm vars
CPAN shell
perl -MCPAN -e shell install vars
For more information on module installation, please visit the detailed CPAN module installation guide.