Swift - How to mutate a struct object when iterating over it

Question

I am still not sure about the rules of struct copy or reference.

I want to mutate a struct object while iterating on it from an array: For instance in this case I wo

Answer 1

I saw this method in some code and it seems to be working

for (var mutableStruct) in arrayOfMyStruct {
  mutableStruct.backgroundColor = UIColor.redColor()
}