none

Returns true if none of the values match the given predicate.

For more information: See none on the documentation website.

Returns true if none of the rows in this DataFrame satisfies the given predicate.

For more information: See none on the documentation website.

The predicate is a RowFilter — a lambda that receives each DataRow as both this and it and is expected to return a Boolean value.

It allows you to define conditions using the row's values directly, including through extension properties for convenient and type-safe access.

For more information, See RowFilter on the documentation website.

Example

// Check if there is not any row where "age" is greater than 18
val hasNoAdults = df.none { age > 18 }

Parameters

See also