uwdata/arquero v2.0.0

on GitHub

Changes from v1.3.1:

• Breaking: Add schema metadata to fromJSON() and toJSON().
• Breaking: Add drop option to spread() verb to drop input columns, set default to true.
• Breaking: Revise spread() to use undefined for missing values.
• Breaking: Revise spread() to use _ separator between column name and index number in auto-generated names.
• Breaking: Revise spread() to use the length of the as option as an implicit limit when limit is unspecified.
• Breaking: Revise pivot() to place value name before key name when multiple values are specified.
• Breaking: Consolidate internal Query and QueryBuilder classes.
• Add impute() verb.
• Add column reference checks to pivot() and rollup().
• Add more flexible join key specification for lookup().
• Update sample() weight calculation to drop unneeded columns.
• Update verb JSDoc comments / TypeScript types.
• Fix input type checks for sequence op functions.
• Fix code generation for safer output.
• Refactor: Expose row_number op for internal use.
• Refactor: Update expression parser error messages.
• Refactor: Add Transformable base class for both Table and Query.
• Refactor: Update ColumnTable constructor.