Trait polars::chunked_array::ops::IsFirst

source · [−]

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

This is supported on crate feature is_first only.

Expand description

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,