Struct arrow::array::PrimitiveDictionaryBuilder [−][src]
pub struct PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType, { /* fields omitted */ }
Expand description
Array builder for DictionaryArray
. For example to map a set of byte indices
to f32 values. Note that the use of a HashMap
here will not scale to very large
arrays or result in an ordered dictionary.
Implementations
impl<K, V> PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
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impl<K, V> PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
[src]pub fn new(
keys_builder: PrimitiveBuilder<K>,
values_builder: PrimitiveBuilder<V>
) -> Self
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pub fn new(
keys_builder: PrimitiveBuilder<K>,
values_builder: PrimitiveBuilder<V>
) -> Self
[src]Creates a new PrimitiveDictionaryBuilder
from a keys builder and a value builder.
impl<K, V> PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
[src]
impl<K, V> PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
[src]pub fn append(&mut self, value: V::Native) -> Result<K::Native>
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pub fn append(&mut self, value: V::Native) -> Result<K::Native>
[src]Append a primitive value to the array. Return an existing index if already present in the values array or a new index if the value is appended to the values array.
pub fn append_null(&mut self) -> Result<()>
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pub fn finish(&mut self) -> DictionaryArray<K>
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pub fn finish(&mut self) -> DictionaryArray<K>
[src]Builds the DictionaryArray
and reset this builder.
Trait Implementations
impl<K, V> ArrayBuilder for PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
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impl<K, V> ArrayBuilder for PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
[src]fn as_any_mut(&mut self) -> &mut dyn Any
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fn as_any_mut(&mut self) -> &mut dyn Any
[src]Returns the builder as an mutable Any
reference.
fn into_box_any(self: Box<Self>) -> Box<dyn Any>
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fn into_box_any(self: Box<Self>) -> Box<dyn Any>
[src]Returns the boxed builder as a box of Any
.
impl<K: Debug, V: Debug> Debug for PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
K::Native: Debug,
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impl<K: Debug, V: Debug> Debug for PrimitiveDictionaryBuilder<K, V> where
K: ArrowPrimitiveType,
V: ArrowPrimitiveType,
K::Native: Debug,
[src]Auto Trait Implementations
impl<K, V> RefUnwindSafe for PrimitiveDictionaryBuilder<K, V> where
<K as ArrowPrimitiveType>::Native: RefUnwindSafe,
<V as ArrowPrimitiveType>::Native: RefUnwindSafe,
<K as ArrowPrimitiveType>::Native: RefUnwindSafe,
<V as ArrowPrimitiveType>::Native: RefUnwindSafe,
impl<K, V> Send for PrimitiveDictionaryBuilder<K, V>
impl<K, V> Sync for PrimitiveDictionaryBuilder<K, V>
impl<K, V> Unpin for PrimitiveDictionaryBuilder<K, V> where
<K as ArrowPrimitiveType>::Native: Unpin,
<V as ArrowPrimitiveType>::Native: Unpin,
<K as ArrowPrimitiveType>::Native: Unpin,
<V as ArrowPrimitiveType>::Native: Unpin,
impl<K, V> UnwindSafe for PrimitiveDictionaryBuilder<K, V> where
<K as ArrowPrimitiveType>::Native: UnwindSafe,
<V as ArrowPrimitiveType>::Native: UnwindSafe,
<K as ArrowPrimitiveType>::Native: UnwindSafe,
<V as ArrowPrimitiveType>::Native: UnwindSafe,
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,