Enum polars_core::prelude::revmap::RevMapping

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pub enum RevMapping {
    Global(PlHashMap<u32, u32>, Utf8ViewArray, u32),
    Local(Utf8ViewArray, u128),
}
Available on crate feature dtype-categorical only.

Variants§

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Global(PlHashMap<u32, u32>, Utf8ViewArray, u32)

Hashmap: maps the indexes from the global cache/categorical array to indexes in the local Utf8Array Utf8Array: caches the string values

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Local(Utf8ViewArray, u128)

Utf8Array: caches the string values and a hash of all values for quick comparison

Implementations§

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impl RevMapping

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pub fn is_global(&self) -> bool

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pub fn is_local(&self) -> bool

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pub fn get_categories(&self) -> &Utf8ViewArray

Get the categories in this RevMapping

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pub fn build_local(categories: Utf8ViewArray) -> Self

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pub fn len(&self) -> usize

Get the length of the RevMapping

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pub fn get(&self, idx: u32) -> &str

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pub fn get_optional(&self, idx: u32) -> Option<&str>

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pub fn same_src(&self, other: &Self) -> bool

Check if the categoricals have a compatible mapping

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pub fn find(&self, value: &str) -> Option<u32>

Trait Implementations§

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impl Clone for RevMapping

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fn clone(&self) -> RevMapping

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for RevMapping

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for RevMapping

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

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Performs the conversion.
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where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V