Struct arrow_array::builder::BooleanBuilder

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pub struct BooleanBuilder { /* private fields */ }
Expand description

Builder for BooleanArray

§Example

Create a BooleanArray from a BooleanBuilder



let mut b = BooleanBuilder::new();
b.append_value(true);
b.append_null();
b.append_value(false);
b.append_value(true);
let arr = b.finish();

assert_eq!(4, arr.len());
assert_eq!(1, arr.null_count());
assert_eq!(true, arr.value(0));
assert!(arr.is_valid(0));
assert!(!arr.is_null(0));
assert!(!arr.is_valid(1));
assert!(arr.is_null(1));
assert_eq!(false, arr.value(2));
assert!(arr.is_valid(2));
assert!(!arr.is_null(2));
assert_eq!(true, arr.value(3));
assert!(arr.is_valid(3));
assert!(!arr.is_null(3));

Implementations§

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impl BooleanBuilder

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pub fn new() -> Self

Creates a new boolean builder

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pub fn with_capacity(capacity: usize) -> Self

Creates a new boolean builder with space for capacity elements without re-allocating

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pub fn capacity(&self) -> usize

Returns the capacity of this builder measured in slots of type T

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pub fn append_value(&mut self, v: bool)

Appends a value of type T into the builder

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pub fn append_null(&mut self)

Appends a null slot into the builder

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pub fn append_nulls(&mut self, n: usize)

Appends n nulls into the builder.

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pub fn append_option(&mut self, v: Option<bool>)

Appends an Option<T> into the builder

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pub fn append_slice(&mut self, v: &[bool])

Appends a slice of type T into the builder

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pub fn append_values( &mut self, values: &[bool], is_valid: &[bool] ) -> Result<(), ArrowError>

Appends values from a slice of type T and a validity boolean slice.

Returns an error if the slices are of different lengths

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pub fn finish(&mut self) -> BooleanArray

Builds the BooleanArray and reset this builder.

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pub fn finish_cloned(&self) -> BooleanArray

Builds the BooleanArray without resetting the builder.

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pub fn validity_slice(&self) -> Option<&[u8]>

Returns the current null buffer as a slice

Trait Implementations§

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impl ArrayBuilder for BooleanBuilder

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fn as_any(&self) -> &dyn Any

Returns the builder as a non-mutable Any reference.

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fn as_any_mut(&mut self) -> &mut dyn Any

Returns the builder as a mutable Any reference.

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fn into_box_any(self: Box<Self>) -> Box<dyn Any>

Returns the boxed builder as a box of Any.

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fn len(&self) -> usize

Returns the number of array slots in the builder

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fn finish(&mut self) -> ArrayRef

Builds the array and reset this builder.

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fn finish_cloned(&self) -> ArrayRef

Builds the array without resetting the builder.

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fn is_empty(&self) -> bool

Returns whether number of array slots is zero
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impl Debug for BooleanBuilder

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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 Default for BooleanBuilder

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Extend<Option<bool>> for BooleanBuilder

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fn extend<T: IntoIterator<Item = Option<bool>>>(&mut self, iter: T)

Extends a collection with the contents of an iterator. Read more
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fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)
Extends a collection with exactly one element.
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fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)
Reserves capacity in a collection for the given number of additional elements. Read more

Auto Trait Implementations§

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, 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<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,