Tabular API

sheetFromRows(rows, options)

Converts an array of plain objects into a worksheet.

• Uses the union of object keys for the header row
• Preserves missing properties as empty cells
• JSON-encodes nested non-array objects
• Supports per-column type overrides

rowsFromSheet(sheet, options)

Converts a worksheet back into row objects.

• Treats the first row as headers
• Disambiguates duplicate headers with suffixes like _2
• Supports per-column type overrides for vectors and dates

inferSchema(sheet)

Scans a worksheet and returns:

• column name
• dominant type
• nullable flag

Use it for import previews, validation scaffolding, or diagnostics.