dfr get for dataframe

Creates dataframe with the selected columns.

Signature

> dfr get

Examples

Returns the selected column

> [[a b]; [1 2] [3 4]] | dfr into-df | dfr get a
╭───┬───╮
│ # │ a │
├───┼───┤
│ 0 │ 1 │
│ 1 │ 3 │
╰───┴───╯