Checkpoint
One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.
Checkpoint: write validate_rows(rows, required) so it counts valid rows and lists the indexes that must be quarantined.
One last thing before we move on. Same surface as a write step — but the lesson doesn't complete until this passes.
Checkpoint: write validate_rows(rows, required) so it counts valid rows and lists the indexes that must be quarantined.