Trait polars::prelude::IsFirst

pub trait IsFirst<T> where
    T: PolarsDataType, {
    fn is_first(&self) -> Result<ChunkedArray<BooleanType>, PolarsError> { ... }
}

Mask the first unique values as true

Provided Methods

fn is_first(&self) -> Result<ChunkedArray<BooleanType>, PolarsError>

Implementors

impl IsFirst<Utf8Type> for ChunkedArray<Utf8Type>

impl<T> IsFirst<T> for ChunkedArray<T> where
    T: PolarsNumericType,