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Higher-Order Functions Practice

Doc2Doc needs a way to restore documents from saved backups. However, not all original documents necessarily have backups, and some backups might be corrupted.

Assignment

Complete the restore_documents function in one line – if you can. It takes two tuples of document strings, originals and backups, as input. It should return a single clean set of all valid documents from both tuples.

Combine the originals and backups tuples.
Convert all the combined documents to uppercase with .upper().
Filter out documents that are corrupted (where the string is just random numbers, checking with .isdigit()).
Return a set to deduplicate the combined valid documents.

Tip

I used map, filter, and lambda functions to complete the function on one "line," but it's formatted in multiple lines for readability.