Trait polars_core::chunked_array::ops::IsFirst

pub trait IsFirst<T: PolarsDataType> {
    fn is_first(&self) -> PolarsResult<BooleanChunked> { ... }
}

Available on crate feature is_first only.

Expand description

Mask the first unique values as true

Provided Methods§

src/series/implementations/utf8.rs (line 342)

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    fn is_first(&self) -> PolarsResult<BooleanChunked> {
        self.0.is_first()
    }

More examples

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src/series/implementations/categorical.rs (line 408)

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    fn is_first(&self) -> PolarsResult<BooleanChunked> {
        self.0.logical().is_first()
    }