Function is_numeric_array

pub fn is_numeric_array(arr: &mut Array) -> bool

Determines if the entire array is numeric (ints or floats).

let x = [1, 2, 3.0, 5.0];
assert_eq(is_numeric_array(x), true);

let x = [1, 2, 3.0, 5.0, "a"];
assert_eq(is_numeric_array(x), false);