---
name: "Hash::Case::Upper"
section: "3pm"
platform: "linux"
package: "perl-hash-case"
version: "1.07-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Hash::Case::Upper"
---

# Hash::Case::Upper(3pm)

native hash with enforced lower cased keys

## NAME

Hash::Case::Upper - native hash with enforced lower cased keys

## INHERITANCE

```
 Hash::Case::Upper
   is a Hash::Case
   is a Tie::StdHash
```

## SYNOPSIS

```
  use Hash::Case::Upper;
  tie my(%uchash), 'Hash::Case::Upper';
  $uchash{StraNGeKeY} = 3;
  print keys %uchash;  # STRANGEKEY
```

## DESCRIPTION

Hash::Case::Upper extends Hash::Case, which lets you play various trics with hash keys. In this implementation, the fake hash is case insensitive and the keys stored in upper-case.

Extends "DESCRIPTION" in Hash::Case.

## METHODS

Extends "METHODS" in Hash::Case.

### Constructors

Extends "Constructors" in Hash::Case.

- tie **%hash**, 'Hash::Case::Upper', \[$values,\] %options

  Define `%hash` to have only upper-cased keys.  The hash is initialized with the `$values`, specified as ARRAY or HASH.  Currently, there are no `%options` defined. Improves base, see "Constructors" in Hash::Case

### Hidden object access

Extends "Hidden object access" in Hash::Case.

- $obj-\>**addHashData**(\\%data)

  Inherited, see "Hidden object access" in Hash::Case

- $obj-\>**addPairs**(@pairs)

  Inherited, see "Hidden object access" in Hash::Case

- $obj-\>**setHash**(\\%data)

  Inherited, see "Hidden object access" in Hash::Case

## SEE ALSO

This module is part of Hash-Case version 1.07, built on January 26, 2026. Website: *http://perl.overmeer.net/CPAN/*

## LICENSE

For contributors see file ChangeLog.

This software is copyright (c) 2002-2026 by Mark Overmeer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.