dfr all-false for dataframe

Returns true if all values are false.

Signature

> dfr all-false

Examples

Returns true if all values are false

> [false false false] | dfr into-df | dfr all-false
╭───┬───────────╮
│ # │ all_false │
├───┼───────────┤
│ 0 │ true      │
╰───┴───────────╯

Checks the result from a comparison

> let s = ([5 6 2 10] | dfr into-df);
    let res = ($s > 9);
    $res | dfr all-false
╭───┬───────────╮
│ # │ all_false │
├───┼───────────┤
│ 0 │ false     │
╰───┴───────────╯