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

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

This is supported on crate feature compute_arithmetics only.

Overflowing subtraction of a scalar T to a primitive array of type T. If the result from the sub is smaller than the possible number for this type, then the result 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_scalar;
use arrow2::array::Int8Array;

let a = Int8Array::from(&[Some(1i8), Some(-100i8)]);
let (result, overflow) = overflowing_sub_scalar(&a, &100i8);
let expected = Int8Array::from(&[Some(-99i8), Some(56i8)]);
assert_eq!(result, expected);