dfr first for dataframe

Show only the first number of rows.

Signature

> dfr first

Examples

Return the first row of a dataframe

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

Return the first two rows of a dataframe

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

dfr first for expression

creates a first expression

Signature

> dfr first

Examples

Creates a first expression from a column

> dfr col a | dfr first