---
name: "Hash::Diff"
section: "3pm"
platform: "linux"
package: "libhash-diff-perl"
version: "0.010-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Hash::Diff"
---

# Hash::Diff(3pm)

Return difference between two hashes as a hash

## NAME

Hash::Diff - Return difference between two hashes as a hash

## SYNOPSIS

```
    use Hash::Diff qw( diff );
    my %a = (
                'foo'    => 1,
            'bar'    => { a => 1, b => 1 },
        );
    my %b = (
                'foo'     => 2,
                'bar'    => { a => 1 },
        );
    my %c = %{ diff( \%a, \%b ) };

    # %c = %{ foo => 1, bar => { b => 1} }
```

## DESCRIPTION

Hash::Diff returns the difference between two hashes as a hash.

- diff ( \<hashref\>, \<hashref\> )

  Diffs two hashes.  Returns a reference to the new hash.

- left\_diff ( \<hashref\>, \<hashref\> )

  Returns the values in the left hash that is not, or different from the right hash.

## CAVEATS

This will not handle self-referencing/recursion within hashes well.   This will only handle HASH and SCALAR.

Plans for a future version include incorporate deep recursion protection. And support for ARRAY.

## BUGS

Sure! Report here: http://rt.cpan.org/NoAuth/Bugs.html?Dist=Hash::Diff

## AUTHOR

Bjorn-Olav Strand \<bo@startsiden.no\>

## CONTRIBUTOR

Charles McGarvey \<ccm@cpan.org\>

## COPYRIGHT

Copyright (c) 2010 ABC Startsiden AS. All rights reserved.

This library is free software.  You can redistribute it and/or modify it  under the same terms as Perl itself.