dfr is-not-null for dataframe

Signature

> dfr is-not-null {flags}

Input/output types:

Examples

Create mask where values are not null

>lets= ([5608] |dfr into-df);
letres= ($s/$s);
$res|dfr is-not-null
╭───┬─────────────╮
│# │ is_not_null │
├───┼─────────────┤
│0│true│
│1│true│
│2│false│
│3│true│
╰───┴─────────────╯

Creates a is not null expression from a column

>dfr cola|dfr is-not-null

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