Setters and Getters apply to computed properties; such properties do not have storage in the instance – the value from the getter is meant to be computed from other instance properties. In your case, there is no x to be assigned. Explicitly: “How can I do this without explicit backing ivars”. You can’t – you’ll … Read more
You can pass an InputStream to the Property, so your file can pretty much be anywhere, and called anything. Properties properties = new Properties(); try { properties.load(new FileInputStream(“path/filename”)); } catch (IOException e) { … } Iterate as: for(String key : properties.stringPropertyNames()) { String value = properties.getProperty(key); System.out.println(key + ” => ” + value); }
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
With C# 6.0, this is now a non-issue as you can do: nameof(SomeProperty) This expression is resolved at compile-time to “SomeProperty”. MSDN documentation of nameof.
It allows the Entity Framework to create a proxy around the virtual property so that the property can support lazy loading and more efficient change tracking. See What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First? for a more thorough discussion. Edit to clarify “create a proxy around”: By “create … Read more
A component cannot update its own props unless they are arrays or objects (having a component update its own props even if possible is an anti-pattern), but can update its state and the props of its children. For instance, a Dashboard has a speed field in its state, and passes it to a Gauge child … Read more
It seems wrong to me to set up an if/else statement just to use the else portion… Just negate your condition, and you’ll get the else logic inside the if: if (!(id in tutorTimes)) { … }
Properties cannot be passed by reference. Here are a few ways you can work around this limitation. 1. Return Value string GetString(string input, string output) { if (!string.IsNullOrEmpty(input)) { return input; } return output; } void Main() { var person = new Person(); person.Name = GetString(“test”, person.Name); Debug.Assert(person.Name == “test”); } 2. Delegate void GetString(string … Read more
I suppose I should expand this answer, now that I’m older and wiser and know what’s going on. Better late than never. You can add a property to a class dynamically. But that’s the catch: you have to add it to the class. >>> class Foo(object): … pass … >>> foo = Foo() >>> foo.a … Read more
My guess is that the compiler version you’re using follows the memory management rules for declared properties, too — more specifically, for declared properties’ accessors: You take ownership of an object if you create it using a method whose name begins with “alloc”, “new”, “copy”, or “mutableCopy”. A property named newTitle, when synthesised, yields a … Read more