dfr str-lengths for dataframe

Get lengths of all strings.

Signature

> dfr str-lengths

Examples

Returns string lengths

> [a ab abc] | dfr into-df | dfr str-lengths
╭───┬───╮
│ # │ 0 │
├───┼───┤
│ 0 │ 1 │
│ 1 │ 2 │
│ 2 │ 3 │
╰───┴───╯