expression

Creates an is-in expression or checks to see if the elements are contained in the right series

This command requires a plugin

The polars is-in command resides in the polars plugin. To use this command, you must install and register nu_plugin_polars. See the Plugins chapter in the book for more information.

Signature

> polars is-in {flags} (list)

Parameters

• list: List to check if values are in

Input/output types:

input	output
any	any

Examples

Creates a is-in expression

> let df = ([[a b]; [one 1] [two 2] [three 3]] | polars into-df);
            $df | polars with-column (polars col a | polars is-in [one two] | polars as a_in)
╭───┬───────┬───┬───────╮
│ # │   a   │ b │ a_in  │
├───┼───────┼───┼───────┤
│ 0 │ one   │ 1 │ true  │
│ 1 │ two   │ 2 │ true  │
│ 2 │ three │ 3 │ false │
╰───┴───────┴───┴───────╯

Checks if elements from a series are contained in right series

> let other = ([1 3 6] | polars into-df);
            [5 6 6 6 8 8 8] | polars into-df | polars is-in $other
╭───┬───────╮
│ # │ is_in │
├───┼───────┤
│ 0 │ false │
│ 1 │ true  │
│ 2 │ true  │
│ 3 │ true  │
│ 4 │ false │
│ 5 │ false │
│ 6 │ false │
╰───┴───────╯