I wouldn’t call it an issue. This is default behaviour for many database systems. Basically, the auto-increment counter for a table is persistent, and deleting entries does not affect the counter. The actual value of the primary key does not affect performance or anything, it only has aesthetic value (if you ever reach the 2 … Read more
What you need there is a read only computed property: var stringArray: [String] { return whiskyArray.map{$0.whiskyName!} }
Notice that an object instance has no __dict__ attribute: >>> dir(object()) [‘__class__’, ‘__delattr__’, ‘__doc__’, ‘__getattribute__’, ‘__hash__’, ‘__init__’, ‘__new__’, ‘__reduce__’, ‘__reduce_ex__’, ‘__repr__’, ‘__setattr__’, ‘__str__’] An example to illustrate this behavior in a derived class: >>> class Foo(object): … __slots__ = {} … >>> f = Foo() >>> f.bar = 42 Traceback (most recent call last): File … Read more
One way to keep track of instances is with a class variable: class A(object): instances = [] def __init__(self, foo): self.foo = foo A.instances.append(self) At the end of the program, you can create your dict like this: foo_vars = {id(instance): instance.foo for instance in A.instances} There is only one list: >>> a = A(1) >>> … Read more