Enum polars::datatypes::categorical::RevMapping

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pub enum RevMapping {
    Global(HashMap<u32, u32, RandomState, Global>, Utf8Array<i64>, u128),
    Local(Utf8Array<i64>),
}

Variants

`Global(HashMap<u32, u32, RandomState, Global>, Utf8Array<i64>, u128)`

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

`Local(Utf8Array<i64>)`

Utf8Array: caches the string values

Implementations

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impl RevMapping

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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

Categorical to str

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

Check if the categoricals are created under the same global string cache.

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

str to Categorical

Trait Implementations

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impl Debug for RevMapping

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

Formats the value using the given formatter. Read more

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impl Default for RevMapping

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fn default() -> RevMapping

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

Auto Trait Implementations

impl RefUnwindSafe for RevMapping

impl Send for RevMapping

impl Sync for RevMapping

impl Unpin for RevMapping

impl UnwindSafe for RevMapping

Blanket Implementations

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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,

const: unstable · source

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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

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> Pointable for T

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const ALIGN: usize

The alignment of pointer.

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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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<V, T> VZip<V> for T where
V: MultiLane<T>,

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Enum polars::datatypes::categorical::RevMapping

Variants

Global(HashMap<u32, u32, RandomState, Global>, Utf8Array<i64>, u128)

Local(Utf8Array<i64>)

Implementations

impl RevMapping

pub fn len(&self) -> usize

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

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

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

Trait Implementations

impl Debug for RevMapping

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

impl Default for RevMapping

fn default() -> RevMapping

Auto Trait Implementations

impl RefUnwindSafe for RevMapping

impl Send for RevMapping

impl Sync for RevMapping

impl Unpin for RevMapping

impl UnwindSafe for RevMapping

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for T where V: MultiLane<T>,

fn vzip(self) -> V

`Global(HashMap<u32, u32, RandomState, Global>, Utf8Array<i64>, u128)`

`Local(Utf8Array<i64>)`

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

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

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

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<V, T> VZip<V> for T where
V: MultiLane<T>,