dfr is-unique for dataframe

Creates mask indicating unique values.

Signature

> dfr is-unique

Input/output types:

input	output
any	any

Examples

Create mask indicating unique values

> [5 6 6 6 8 8 8] | dfr into-df | dfr is-unique
╭───┬───────────╮
│ # │ is_unique │
├───┼───────────┤
│ 0 │ true      │
│ 1 │ false     │
│ 2 │ false     │
│ 3 │ false     │
│ 4 │ false     │
│ 5 │ false     │
│ 6 │ false     │
╰───┴───────────╯

Create mask indicating duplicated rows in a dataframe

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

Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag