setter

问题 I'm trying to access and modify a variable of a thread in another thread in java, and I really don't know how to do this. ex : Runnable r1 = new Runnable() { int value = 10; public void run() { // random stuff } } Runnable r2 = new Runnable() { public void run() { // of course the bellow line will not work r1.value--; // I want here to be able to decrement the variable "value" of r1 } } Thread t1 = new Thread(r1); Thread t2 = new Thread(r2); t1.start(); t2.start(); thank you if you have any

问题 While working with Node.js, Mongoose and MongoDB, I have found that my Mongoose schema getters and setters do not fire when I perform a findOne query. I have found an old thread that suggests there was an issue with getters and setters in version 2.x, but it states that it has since been resolved and I'm using the very latest version of Mongoose (3.8.7). Here's part of my schema function testGetter(value) { return value + " test"; } /** * Schema */ var schema = new Schema({ username: { type:

问题 I have a Many to Many relationship between my Entities: PurchaseOrder and Supplier . When I want do add a Supplier to an order in my Symfony project, I always get this error message: Property "suppliers" is not public in class "Acme\AppBundle\Entity\PurchaseOrder". Maybe you should create the method "setSuppliers()"? When I make a setSuppliers() function by myself in the PurchaseOrder Entity: public function setSuppliers(\Acme\AppBundle\Entity\Supplier $suppliers ) { $this->suppliers =

问题 If you've a domain class in a grails project you can also use getter and setter to write or read them. For example domain class Book has attribute: String author In controller you've a book and you want to set the author for this book: This works with direct access to the attribute or with getter and setter methods although they aren't in the class. book.author = "Mike Miller" book.setAuthor("Mike Miller") What's the preferred way of getting and setting attributes in groovy & grails? 回答1:

问题 A Superclass : class MySuperView : UIView{ var aProperty ; } A subclass inheritance the super class : class Subclass : MySuperClass{ // I want to override the aProperty's setter/getter method } I want to override the superclass's property's setter/getter method , how to override this method in Swift ? Please help me , thanks . 回答1: What do you want to do with your custom setter? If you want the class to do something before/after the value is set, you can use willSet / didSet : class

问题 I'd like to have a class with two array subscript operator overloads: one used for reading and the other for writing. The pourpose is to keep a counter of changes. I read (at http://faculty.cs.niu.edu/~mcmahon/CS241/c241man/node97.html) that I could do something like this: template<typename T> class Array { public: Array() { data = new T[100]; } T &operator[] (int index) { cout << "Is writing\n"; changes++; return data[index]; } T operator[] (int index) const { cout << "Is reading\n"; return

问题 What is the reason why Wrapper classes (like Integer, Double, etc.) don't have a setter for their inner primitive value ? I am asking this because that kind of functionality would have simplified calculus, and have made the Java language a little more flexible . Let me give you some examples. 1) Let's take the following example: Integer x = new Integer(5); x++; The previous code behind the scenes is performing autoboxing . Something like: int x_tmp = x.intValue(); x_tmp++; x = new Integer(x

问题 If you have multiple properties that implement the same method in the setter, is there a way to make it part of the default setter? If I have multiple properties that call a Filter() when they are set, is there a way to push it into a "base setter" so that I don't have to have the Filter() call in every setter? private string _MyVal1; public string MyVal1 { get { return _MyVal1; } set { _MyVal1 = value; Filter(); OnPropertyChanged("MyVal1"); } } private string _MyVal2; public string MyVal2 {

问题 what are actually getter and setter methods in ES6 class definition? are they infact prototype props ? for examle: class Person{ constructor(){}; get name(){ return 'jack'; } set name(){ // ??? } } does this equals to Person.prototype.name = 'jack'; and another question, i ve seen examples of setters which utilizes the instance's prop like: class Person{ constructor(){ this._name = 'jack'; }; get name(){ return this._name; } set name(val){ this._name = val; } } i dont wanna do this way, i

问题 Can I get some working code examples that I can pick apart and study how they work? Specifically, I need to figure out how do I get the address field from the x numbered object in my list? How do I delete the xth object from the list? How do I set the price field of object x to a new value? I understand how the houseList.add places the data into a new object that is appended to the end of the list, but I do not understand the converse of it and how to target a specific object and manipulate