7 lines
398 B
Plaintext
7 lines
398 B
Plaintext
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A weak reference is just like an ordinary Perl reference except that it
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isn't included in the reference count of the thing referred to. This
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means that once all references to a particular piece of data are weak,
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the piece of data is freed and all the weak references are set to undef.
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This is particularly useful for implementing circular data structures
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without memory leaks or caches of objects.
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