getter

问题 I realise that this has been asked but have researched and failed - sorry! I want to implement encapsulation in JS as simply as possible. I realise that any 'var' in the class will be private. I am simply unsure how to GET and SET values of any private var. In the example below the interface methods for GETTING and SETTING 'colour' do not work because those functions cannot access the private 'colour' property of the object. I cannot find a clear example showing me how to implement this. I am

问题 I have a class as follows: class Foo : PropertyChangedBase { private int _property; public int Property { get { return _property; } set { OnAssignPropertyChanged("Property", () => _property, value); } } PropertyChangedBase implements INotifyPropertyChanged with the following methods: protected void OnAssignmentPropertyChanged<T>(string propertyName, Expression<Func<T>> fieldExpression, T value) { var get = fieldExpression.Compile(); if (get().Equals(value)) { return; } // invoke set property

问题 I'm using a library called which takes a JS object as an input. Unfortunately, the JSONP api that I am using returns an object containing getters and setters, which this particular library does not know how to handle. How can I remove all getters and setters from an object while retaining the values of the properties, so I have a Plain Old JavaScript Object? 回答1: a solution for this special case/environment/setting might look like that ... var obj = JSON.parse(JSON.stringify(model)); console

问题 If I don't want to expose the state of my object, but I still need to display it (in HTML, XML or JSON let's say), how would I go about doing that in an MVC environment. Does it make sense to have an export method which exports a dumbed down immutable object (a "data class" if you will). What about adding in a render method which talks to an interface? Are there any other approaches to this problem? 回答1: The render method comes the closest to not exposing state. Another method (well-known to

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I am trying to write an abstract class. This class is going to be a Field. There will be different types of fields which will need to extend the field class and write its own setter class. For example....There will be a String Field and an Integer Field. String Field will need to extend the Field

问题 How can I pass property getter to a function that accepts function type? Here is an example of what I want achieve: class Test { val test: String get() = "lol" fun testFun(func: ()->String) { // invoke it here } fun callTest() { testFun(test::get) // error: Type mismatch: inferred type is // KFunction1<@ParameterName Int, Char> but () -> String was expected } } Is there a way? 回答1: You can reference the getter by writing ::test (or this::test ). When you write test::get , you are actually

问题 How do I fix this error? Variable with getter/setter cannot have an initial value Here's my code: func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { var cell: UITableViewCell = tableview.dequeueReusableCellWithIdentifier("cell") as UITableViewCell { //Error cell.textLabel?.text = self.items[indexPath.row] //Error return cell; //Error } } 回答1: I think you have an extra set of {} As it is, you're defining a block and assigning it to the

问题 I have created an enum as so: enum Types { hi, hello, bye } I have added a getter inside each individual enum as so: enum Types { hi { String test = "From hi"; public String getString() { return test; }, etc. } Except I cannot call "Types.hi.getString()". Is there any way to do this? Thanks! 回答1: In your enum class, define the method you want to access as public abstract . Like so: enum Types { hi { public String getString() { return "From hi"; } }; public abstract String getString(); } As an

问题 So I've run into a bit of a problem dealing with preferences in a program. Considering the amount of times this will be used, having a single method would be best. A getter for each variable could potentially lead to a substantially larger file. (5 fields * 200 to 300 classes = lots of wasted space) I am trying to figure out how to access a Field with a defined and constant name from a subclass. The super class is abstract, defined in a list and I have full access to it. This is the class

问题 I'm working in .net 3.5. I have a class "A" which has a stack and a getter property which, when called, removes the first item in the stack and retrieves the next one. After initializing the class, I saw that the getter works without being called, and removes the top item in the stack, thus giving me bad results. A breakpoint in the getter did not show anyone passing through it. When I change the property to a function, the stack is returned ok. I'd be happy if someone could explain why is