By calling the super method, you’re not overriding the behavior of the method, you’re extending it. A call to super will perform any logic the class you’re extending has defined for that method. Take into account that it might be important the moment when you call super‘s implementation in your method overriding. For instance: public … Read more
In Python, methods are just key-value pairs in the dictionary attached to the class. When you are deriving a class from a base class, you are essentially saying that method name will be looked into first derived class dictionary and then in the base class dictionary. In order to “override” a method, you simply re-declare … Read more
If you’re using a new-style class (i.e. derives from object in Python 2, or always in Python 3), you can do it with super() like this: super(Derived, cls).do(a) This is how you would invoke the code in the base class’s version of the method (i.e. print cls, a), from the derived class, with cls being … Read more
You can do this using NSAttributedString Example: let underlineAttribute = [NSAttributedString.Key.underlineStyle: NSUnderlineStyle.thick.rawValue] let underlineAttributedString = NSAttributedString(string: “StringWithUnderLine”, attributes: underlineAttribute) myLabel.attributedText = underlineAttributedString EDIT To have the same attributes for all texts of one UILabel, I suggest you to subclass UILabel and overriding text, like that: Swift 5 Same as Swift 4.2 but: You should prefer … Read more
//Written by K@stackoverflow public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here ArrayList<Person> people = new ArrayList<Person>(); people.add(new Person(“Subash Adhikari”, 28)); people.add(new Person(“K”, 28)); people.add(new Person(“StackOverflow”, 4)); people.add(new Person(“Subash Adhikari”, 28)); for (int i = 0; i < people.size() … Read more
I did not understand what exactly you’re trying to do, but normally implementing object-specific behaviour is done along these lines: function MyClass(name) { this.name = name; } MyClass.prototype.doStuff = function() { // generic behaviour } var myObj = new MyClass(‘foo’); var myObjSpecial = new MyClass(‘bar’); myObjSpecial.doStuff = function() { // do specialised stuff // how … Read more
Overloading is defining functions that have similar signatures, yet have different parameters. Overriding is only pertinent to derived classes, where the parent class has defined a method and the derived class wishes to override that method. In PHP, you can only overload methods using the magic method __call. An example of overriding: <?php class Foo … Read more
You can try out this code. Since you cannot override valueOf method you have to define a custom method (getEnum in the sample code below) which returns the value that you need and change your client to use this method instead. public enum RandomEnum { StartHere(“Start Here”), StopHere(“Stop Here”); private String value; RandomEnum(String value) { … Read more
Polymorphism 1. Static binding/Compile-Time binding/Early binding/Method overloading.(in same class) 2. Dynamic binding/Run-Time binding/Late binding/Method overriding.(in different classes) overloading example: class Calculation { void sum(int a,int b){System.out.println(a+b);} void sum(int a,int b,int c){System.out.println(a+b+c);} public static void main(String args[]) { Calculation obj=new Calculation(); obj.sum(10,10,10); // 30 obj.sum(20,20); //40 } } overriding example: class Animal { public void move(){ … Read more
The book is a bit dated with respect to subclass-superclass calling. It’s also a little dated with respect to subclassing built-in classes. It looks like this nowadays: class FileInfo(dict): “””store file metadata””” def __init__(self, filename=None): super(FileInfo, self).__init__() self[“name”] = filename Note the following: We can directly subclass built-in classes, like dict, list, tuple, etc. The … Read more