ValueTypesVsReferenceTypes

//reference types
class someClass {
    var name: String
    init(name: String) {
        self.name = name
    }
}

var aClass = someClass(name: "James")
var bClass = aClass
bClass.name = "Sasha"

print(aClass.name) // "Sasha"
print(bClass.name) // "Sasha"

//value types
struct SomeStruct {
    var name: String
    init(name: String) {
        self.name = name
    }
}

var aStruct = SomeStruct(name: "James")
var bStruct = aStruct
bStruct.name = "Sasha"

print(aStruct.name) // "James"
print(bStruct.name) // "Sasha"

helpful to understand reference and value types in swift.