properties

Error in Swift class: Property not initialized at super.init call

Quote from The Swift Programming Language, which answers your question: “Swift’s compiler performs four helpful safety-checks to make sure that two-phase initialization is completed without error:” Safety check 1 “A designated initializer must ensure that all of the “properties introduced by its class are initialized before it delegates up to a superclass initializer.” Excerpt From: … Read more

How does the @property decorator work in Python?

The property() function returns a special descriptor object: It is this object that has extra methods: These act as decorators too. They return a new property object: that is a copy of the old object, but with one of the functions replaced. Remember, that the @decorator syntax is just syntactic sugar; the syntax: really means the same thing as so foo the function is replaced … Read more