# man > Memoize::NDBM_File(3perl)

## NAME
    [Memoize::NDBM_File](https://www.chedong.com/phpMan.php/perldoc/Memoize%3A%3ANDBMFile/markdown) - glue to provide EXISTS for NDBM_File for Storable use

## DESCRIPTION
    This class provides EXISTS support for NDBM_File.

    In Perl 5.37.3 <<https://github.com/Perl/perl5/commit/c0a1a377c02ed789f5eff667f46a2314a05c5a4c>>,
    support for "EXISTS" was added to NDBM_File itself. Code which requires such a perl should
    simply use NBDM_File directly.