Function apply_binary 

pub fn apply_binary<T, F, O, S1, S2, S3, D>(
    input1: &ArrayBase<S1, D>,
    input2: &ArrayBase<S2, D>,
    output: &mut ArrayBase<S3, D>,
    op: F,
) -> Result<(), &'static str>
where
    S1: Data<Elem = T>,
    S2: Data<Elem = T>,
    S3: Data<Elem = O> + DataMut,
    T: Clone + Send + Sync,
    O: Clone + Send + Sync,
    F: Fn(&T, &T) -> O + Send + Sync,
    D: Dimension,

Helper function to apply a binary operation element-wise with broadcasting