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Destructors aren't a good way to free resources in a garbage collected language.

I have yet to see a language that actually cleans up after itself. Many will attempt to free memory, but what about files, db connections, windows, sockets?

Have you heard about Racket's custodians? [1] http://docs.racket-lang.org/reference/eval-model.html#(part....

Does ref-counting count as garbage collection?

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