query library

Filtering and sorting extensions for CsvTable.

These extensions add query functionality to any CsvTable instance:

Filtering (CsvTableFiltering):

• CsvTableFiltering.where: filter rows by predicate.
• CsvTableFiltering.firstWhere: find first matching row.
• CsvTableFiltering.any / CsvTableFiltering.every: row predicates.
• CsvTableFiltering.range, CsvTableFiltering.take, CsvTableFiltering.skip: slicing.
• CsvTableFiltering.distinct: deduplicate by all or selected columns.

Sorting (CsvTableSorting):

• CsvTableSorting.sortBy: sort by column name.
• CsvTableSorting.sortByIndex: sort by column index.
• CsvTableSorting.sortByMultiple: multi-column compound sort.
• CsvTableSorting.sort: custom comparator.

final young = table.where((row) => row['age'] < 30);
table.sortBy('name');