Added a common framework for doing transformation steps.
This was over engineering for the immediate use case of some mapping of old Duolingo lesson tags to the revamped ones introduced today, but I decided to add the appropriate machinery to allow for any combination of processing.
Added a common framework for doing transformation steps.
This was over engineering for the immediate use case of some mapping of old Duolingo lesson tags to the revamped ones introduced today, but I decided to add the appropriate machinery to allow for any combination of processing.