polars_arrow::scalar

Struct DictionaryScalar

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pub struct DictionaryScalar<K: DictionaryKey> { /* private fields */ }
Expand description

The DictionaryArray equivalent of Array for Scalar.

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impl<K: DictionaryKey> DictionaryScalar<K>

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pub fn new(dtype: ArrowDataType, value: Option<Box<dyn Scalar>>) -> Self

returns a new DictionaryScalar

§Panics

iff

  • the dtype is not List or LargeList (depending on this scalar’s offset O)
  • the child of the dtype is not equal to the values
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pub fn value(&self) -> Option<&Box<dyn Scalar>>

The values of the DictionaryScalar

Trait Implementations§

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impl<K: Clone + DictionaryKey> Clone for DictionaryScalar<K>

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fn clone(&self) -> DictionaryScalar<K>

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<K: Debug + DictionaryKey> Debug for DictionaryScalar<K>

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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<K: DictionaryKey> PartialEq for DictionaryScalar<K>

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<K: DictionaryKey> Scalar for DictionaryScalar<K>

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fn as_any(&self) -> &dyn Any

convert itself to
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fn is_valid(&self) -> bool

whether it is valid
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fn dtype(&self) -> &ArrowDataType

the logical type.

Auto Trait Implementations§

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impl<K> Freeze for DictionaryScalar<K>

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impl<K> !RefUnwindSafe for DictionaryScalar<K>

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impl<K> Send for DictionaryScalar<K>

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impl<K> Sync for DictionaryScalar<K>

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impl<K> Unpin for DictionaryScalar<K>
where K: Unpin,

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impl<K> !UnwindSafe for DictionaryScalar<K>

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,

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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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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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
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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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.