DBM_Filter::null(3pm)

💖 NAME 💖

okay so we're in DBM_Filter::null(3pm), part of the Perl Programmers Reference Guide, and this page is literally about the null filter for DBM_Filter — cute, focused, iconic.

✨ SYNOPSIS ✨

bestie, here's the whole vibe:

use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
use DBM_Filter ;

$db = tie %hash, ...
$db->Filter_Push('null');

🦋 DESCRIPTION 🦋

So this filter makes sure that all data written to the DBM file is null terminated. That's it, that's the whole main-character job. 💅

It's useful when you've got a perl script that needs to interoperate with a DBM file that a C program also uses. A fairly common issue is for the C application to include the terminating null in a string when it writes to the DBM file. This filter ensures that all data written to the DBM file can be read by the C application. no cap, that interop glow-up is the point. ✨

🌸 SEE ALSO 🌸

go read these too, bestie:

• DBM_Filter
• perldbmfilter

🎀 AUTHOR 🎀

Paul Marquess pmqs@cpan.org — yeah, that's the author, periodt. 🫶

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and that's the page, babes: this is DBM_Filter::null(3pm) from perl v5.42.3, dated 2026-11-03. mwah 💖🌷