The the Tie::RefHash manpage module can be used to access hashes by reference. This is useful when you index by object, for example.
The problem with the Tie::RefHash manpage, and cross indexing, is that sometimes the index should not contain strong references to the objecs. the Tie::RefHash manpage's internal structures contain strong references to the key, and provide no convenient means to make those references weak.
This subclass of the Tie::RefHash manpage has weak keys, instead of strong ones. The values are left unaltered, and you'll have to make sure there are no strong references there yourself.
| Package Version | Update ID | Released | Package Hub Version | Platforms | Subpackages |
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| 0.09-bp156.3.1 info | GA Release | 2023-07-22 | 15 SP6 |
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| 0.09-bp155.2.9 info | GA Release | 2023-05-17 | 15 SP5 |
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| 0.09-bp154.1.19 info | GA Release | 2022-05-09 | 15 SP4 |
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| 0.09-bp153.1.14 info | GA Release | 2021-03-06 | 15 SP3 |
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| 0.09-bp152.3.13 info | GA Release | 2020-04-16 | 15 SP2 |
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| 0.09-bp151.3.1 info | GA Release | 2019-07-17 | 15 SP1 |
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| 0.09-bp151.2.11 info | GA Release | 2019-05-18 | 15 SP1 |
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| 0.09-bp150.2.4 info | GA Release | 2018-07-30 | 15 |
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