How do I empty a slice in a RefMut<&mut [u8]>?
Solution 1:
You can use the dereference operator to write back to the RefCell.
let refcell: RefCell<&[u8]> = RefCell::new(&[1, 2, 3]);
{
let mut data = refcell.borrow_mut();
*data = &[];
// or equivalently, *refcell.borrow_mut() = &[];
}
println!("{:?}", refcell); // RefCell { value: [] }