Method from_iter

arrow-array/src/array/primitive_array.rs:1456–1479

(iter: I)

impl<T: ArrowPrimitiveType, Ptr: Into<NativeAdapter<T>>> FromIterator<Ptr> for PrimitiveArray<T> {
    fn from_iter<I: IntoIterator<Item = Ptr>>(iter: I) -> Self {
        let iter = iter.into_iter();
        let (lower, _) = iter.size_hint();

        let mut null_builder = NullBufferBuilder::new(lower);

        let buffer: Buffer = iter
            .map(|item| {
                if let Some(a) = item.into().native {
                    null_builder.append_non_null();
                    a
                } else {
                    null_builder.append_null();
                    // this ensures that null items on the buffer are not arbitrary.
                    // This is important because fallible operations can use null values (e.g. a vectorized "add")
                    // which may panic (e.g. overflow if the number on the slots happen to be very large).
                    T::Native::default()
                }
            })
            .collect();

        let maybe_nulls = null_builder.finish();
        PrimitiveArray::new(ScalarBuffer::from(buffer), maybe_nulls)
    }
}

impl<T: ArrowPrimitiveType> PrimitiveArray<T> {