dfr is-duplicated for dataframe

Creates mask indicating duplicated values.

Signature

> dfr is-duplicated

Input/output types:

input	output
any	any

Examples

Create mask indicating duplicated values

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

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-duplicated
╭───┬───────────────╮
│ # │ is_duplicated │
├───┼───────────────┤
│ 0 │ true          │
│ 1 │ true          │
│ 2 │ true          │
│ 3 │ true          │
│ 4 │ false         │
╰───┴───────────────╯

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