polars_core::chunked_array::metadata

Enum MetadataReadGuard

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pub enum MetadataReadGuard<'a, T: PolarsDataType + 'a> {
    Unlocked(RwLockReadGuard<'a, Metadata<T>>),
    Locked(&'a Metadata<T>),
}
Expand description

A read guard for Metadata

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Unlocked(RwLockReadGuard<'a, Metadata<T>>)

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Locked(&'a Metadata<T>)

Methods from Deref<Target = Metadata<T>>§

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pub const DEFAULT: Metadata<T> = _

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pub fn filter_props_cast<O: PolarsDataType>( &self, props: MetadataProperties, ) -> Metadata<O>

Create a Metadata with only the properties set in props.

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pub fn filter_props(&self, props: MetadataProperties) -> Self

Create a Metadata with only the properties set in props.

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pub fn merge(&self, other: Self) -> MetadataMerge<T>

Merge the maximum information from both Metadatas into one Metadata.

It returns

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pub fn is_empty(&self) -> bool

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pub fn is_sorted_ascending(&self) -> bool

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pub fn is_sorted_descending(&self) -> bool

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pub fn get_fast_explode_list(&self) -> bool

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pub fn is_sorted_any(&self) -> bool

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pub fn is_sorted(&self) -> IsSorted

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pub fn get_flags(&self) -> MetadataFlags

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pub fn get_min_value(&self) -> Option<&T::OwnedPhysical>

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pub fn get_max_value(&self) -> Option<&T::OwnedPhysical>

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pub fn get_distinct_count(&self) -> Option<IdxSize>

Trait Implementations§

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impl<'a, T: PolarsDataType + 'a> Deref for MetadataReadGuard<'a, T>

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type Target = Metadata<T>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.

Auto Trait Implementations§

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impl<'a, T> Freeze for MetadataReadGuard<'a, T>

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impl<'a, T> RefUnwindSafe for MetadataReadGuard<'a, T>

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impl<'a, T> !Send for MetadataReadGuard<'a, T>

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impl<'a, T> Sync for MetadataReadGuard<'a, T>

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impl<'a, T> Unpin for MetadataReadGuard<'a, T>

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impl<'a, T> UnwindSafe for MetadataReadGuard<'a, T>

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

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fn vzip(self) -> V