Function polars::export::arrow::compute::arithmetics::basic::overflowing_sub

pub fn overflowing_sub<T>(
    lhs: &PrimitiveArray<T>, 
    rhs: &PrimitiveArray<T>
) -> (PrimitiveArray<T>, Bitmap) where
    T: NativeArithmetics + OverflowingSub<Output = T>, 

This is supported on crate feature compute_arithmetics only.

Overflowing subtraction of two primitive arrays. If the result from the sub is smaller than the possible number for this type, the result for the operation will be an array with overflowed values and a validity array indicating the overflowing elements from the array.

Examples

use arrow2::compute::arithmetics::basic::overflowing_sub;
use arrow2::array::Int8Array;

let a = Int8Array::from(&[Some(1i8), Some(-100i8)]);
let b = Int8Array::from(&[Some(1i8), Some(100i8)]);
let (result, overflow) = overflowing_sub(&a, &b);
let expected = Int8Array::from(&[Some(0i8), Some(56i8)]);
assert_eq!(result, expected);