Posted by: Margaret Rouse
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|Here’s a pretty easy way to automatically collect unused memory. Put a counter on each object, signifying how many outside references there are to this object. When it gets to zero, you know there are no references to it, so it can be deleted.
When another object starts referencing that object, it needs to increment the reference count by one. When it stops referencing it, the referrer needs to decrement the reference count.
Daniel Ehrenberg, A quick intro to garbage collection