fixlengths

Ensures all rows have the same number of fields by padding shorter rows or truncating longer rows. Useful for data cleaning workflows.

Write with --output. A trailing path is not a positional argument.

# Pad rows with empty string (default)
undatum fixlengths data.csv --strategy pad --output output.csv

# Pad with custom value
undatum fixlengths data.jsonl --strategy pad --value "N/A" --output output.jsonl

# Truncate longer rows
undatum fixlengths data.csv --strategy truncate --output output.csv

Key options: --strategy pad|truncate, --value (pad filler), --output. Also accepts --table, --flatten-nested, --on-error, --error-log, and --quotechar (shared options).