Function copyto 

pub fn copyto<T, D1, D2>(
    dst: &mut Array<T, D1>,
    src: &Array<T, D2>,
) -> FerrayResult<()>
where
    T: Element,
    D1: Dimension,
    D2: Dimension,

Copy values from src into dst, broadcasting src to dst.shape().

Equivalent to np.copyto(dst, src) without the casting= or where= parameters. src may have any dimension type — it only needs to be broadcast-compatible with dst.shape(). The destination shape is fixed, so src can never grow the destination.

Errors

Returns FerrayError::ShapeMismatch if src.shape() cannot be broadcast into dst.shape(). On error dst is left untouched.