Method ToSchema

export.go:104–137

ToSchema to export the datatable to a schema struct

(opt ...ExportOption)

// ToSchema to export the datatable to a schema struct
func (t *DataTable) ToSchema(opt ...ExportOption) *Schema {
	if t == nil {
		return nil
	}

	opts := newExportOptions(opt...)
	if err := t.evaluateExpressions(); err != nil {
		panic(err)
	}

	schema := &Schema{
		Name: t.name,
		Rows: make([][]interface{}, 0, t.nrows),
	}

	// visible columns
	var cols []int
	for i, col := range t.cols {
		if opts.WithHiddenCols || col.IsVisible() {
			cols = append(cols, i)
			schema.Columns = append(schema.Columns, SchemaColumn{Type: col.UnderlyingType().Name(), Name: col.Name()})
		}
	}

	for i := 0; i < t.nrows; i++ {
		r := make([]interface{}, 0, len(cols))
		for _, pos := range cols {
			r = append(r, t.cols[pos].serie.Get(i))
		}
		schema.Rows = append(schema.Rows, r)
	}

	return schema
}