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  5. Object-Oriented Programming with S3 and R6 in R

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Exercises

The Final Countdown

What are good uses of a finalize() method for your R6 class? Choose all the options that apply.

  1. Closing connections to a database.
  2. Removing all objects in the global environment.
  3. Reverting settings to global options() (docs) or graphics par() (docs) parameters.
  4. Forcing a garbage collection.

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