Cindy Wang (CindyLinz) > Hash-Identity-0.01 > Hash::Identity

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Module Version: 0.01   Source  

NAME ^

Hash::Identity - Get a hash that always returns the key

VERSION ^

Version 0.01

SYNOPSIS ^

    use Hash::Identity qw(e);

    print "The result is: $e{ 1 + 2 }\n";
    print "sin(1) = $e{ sin(1) }\n";

    # Or you wish to import multiple. though I think one is usually sufficient.

    use Hash::Identity qw(ident expr);

    print "You could use expr like this: $expr{2**3}.\n";
    print "Or you could use ident $ident{ 'a' . 'b' } as well.\n";

    # NOTE

    use Hash::Identity qw(e);
    print "If you want to just call a sub without params. Don't use $e{ rand }. Use $e{ rand() } instead.\n";

DESCRIPTION ^

To get a hash that always returns the key.

A hash that always returns the key is useful when interpolating EXPR in a double quoted string.

This module uses Tie::Hash::Identity to achieve this, and provides a better importing interface.

EXPORT ^

This module will not export anything by default. You could assign each name you want to use like this:

    use Hash::Identity qw(a b c);

Then you will have identity hash %a, %b, and %c.

SEE ALSO ^

Tie::Hash::Identity

AUTHOR ^

Cindy Wang (CindyLinz)

BUGS ^

Please report any bugs or feature requests to bug-hash-identity at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Hash-Identity. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

LICENSE AND COPYRIGHT ^

Copyright 2010 Cindy Wang (CindyLinz).

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

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