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Set::Equality zef:lizmat last updated on 2021-11-07

NAME

Set::Equality - Implement (==) for older Raku versions

SYNOPSIS

use Set::Equality;

say (1,2,3) (==) (3,1,2);  # True

DESCRIPTION

The Set::Equality module implements the (==) operator (and its unicode version ≡, and its counterpart ≢) for versions of Raku before the 2020.06 Rakudo compiler release. Its implementation and tests are identical to the ones from Rakudo 2020.06 and later.

On versions of Rakudo that already implement the (==) operator and its friends, loading this module is basically a no-op.

The (==) operator conceptually coerces its parameters to Sets for non-QuantHash types. So:

(1,2,3) (==) (3,1,2)

is conceptually the same as:

(1,2,3).Set eqv (3,1,2).Set

It will however actually do as little actual coercion as possible to provide the True or False it is to return. For example:

<foo bar baz> (==) %hash

will return True if there are 3 keys in the hash, and they are foo, bar and baz, and each of these keys holds a truthy value.

AUTHOR

Elizabeth Mattijsen [email protected]

Source can be located at: https://github.com/lizmat/Set-Equality . Comments and Pull Requests are welcome.

COPYRIGHT AND LICENSE

Copyright 2020, 2021 Elizabeth Mattijsen

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.