polars_arrow::scalar

Struct Utf8Scalar

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pub struct Utf8Scalar<O: Offset> { /* private fields */ }
Expand description

The implementation of Scalar for utf8, semantically equivalent to Option<String>.

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impl<O: Offset> Utf8Scalar<O>

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pub fn new<P: Into<String>>(value: Option<P>) -> Self

Returns a new Utf8Scalar

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pub fn value(&self) -> Option<&str>

Returns the value irrespectively of the validity.

Trait Implementations§

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impl<O: Clone + Offset> Clone for Utf8Scalar<O>

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fn clone(&self) -> Utf8Scalar<O>

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<O: Debug + Offset> Debug for Utf8Scalar<O>

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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<O: Offset, P: Into<String>> From<Option<P>> for Utf8Scalar<O>

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fn from(v: Option<P>) -> Self

Converts to this type from the input type.
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impl<O: PartialEq + Offset> PartialEq for Utf8Scalar<O>

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fn eq(&self, other: &Utf8Scalar<O>) -> 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<O: Offset> Scalar for Utf8Scalar<O>

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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.
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impl<O: Eq + Offset> Eq for Utf8Scalar<O>

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impl<O: Offset> StructuralPartialEq for Utf8Scalar<O>

Auto Trait Implementations§

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impl<O> Freeze for Utf8Scalar<O>

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impl<O> RefUnwindSafe for Utf8Scalar<O>

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impl<O> Send for Utf8Scalar<O>

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impl<O> Sync for Utf8Scalar<O>

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impl<O> Unpin for Utf8Scalar<O>
where O: Unpin,

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impl<O> UnwindSafe for Utf8Scalar<O>
where O: UnwindSafe,

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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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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.