Tie::RefHash subclass with weakened references in the keys
DescriptionTie::RefHash can be used to access hashes by reference. This is useful when you index by object, for example. The problem with Tie::RefHash, and cross indexing, is that sometimes the index should not contain strong references to the objecs. The internal structures of Tie::RefHash contain strong references to the key, and provide no convenient means to make those references weak. Tie::RefHash::Weak 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.
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If the package is available for the distribution you are currently using on your computer then install the software by clicking on…Install libtie-refhash-weak-perl