super antispy

Super is used to solve multiple inheritance problems, it is not a problem to call the parent class directly with the class name when using single inheritance, but if multiple inheritance is used, it involves various problems such as lookup order (MRO), repeated invocation (Diamond inheritance). In short, the experience left behind is: to maintain consistency. Either call the parent class with the class name, or use

Note: python3 is the runtime environment. The example is taken from Chapter 8th of pythoncookbook. In python, there are two main methods to initialize the parent class if the subclass is to be implemented. The first method is to directly use the parent class name, and the second method... quot; gt; lt; metaname quot; keywords quot; content quot; call details of pythonsuper in multi-inheritance. note: python 3 is the runtime environment, the example is taken from Chapter 8th of python cookb

Summarize the keyword this and the super usage. AUTHOR:ZJ 07-3-12blog: [Url]http://zhangjunhd.blog.51cto.com/[/url]1. What is super? What is this? The Super keyword denotes the meaning of the super (parent) class. The This variable represents the object itself. 2. Use Superthis to call member variables and methods you

Two special variables in Java: this and super -- general Linux technology-Linux programming and kernel information. The following is a detailed description. There are two very special variables in Java: this and super. These two variables do not need to be declared before use. This variable is used inside a member function and points to the current object. The current object refers to the object that calls

When the subclass needs to call the method of the parent class, before python2.2, call the class's method directly with the class name, that is, the non-binding class method, and the self of the object is passed in the argument. Class A (object): def Say (self): print ' I am A ' class B (a): def Say (self): print ' I am B ' A.say ( Self) B = B () B.say () Output I am BI am A This works fine, but there is a problem, when the parent class changed the name, it is necessary to

Think of Python's super () function, pythonsuper Python-super Thought of by the super () function of Python First, let's take a look.super()Function Definition: super([type [,object-or-type]])Return a **proxy object** that delegates method calls to a **parent or sibling** class of type. ReturnsProxy objectThis object

wrong, hehe.Third, in the function, it is necessary to refer to the current object of the class that the letter belongs to, directly with this. In fact, these usage summary is from the "This is a pointer to the object itself" this sentence of a deeper understanding of the word, rote or easy to forget and easy to make mistakes, to understand! second, Super Super key is similar to this, is a masked member va

Super chain: Super Outside the chain is a collection similar to Alexa ranking query, PR query webmaster commonly used to query the site, because these sites are mostly query record display function, and query records can be Baidu, Google, Sogou and other search engines quickly included, so that the formation of the chain. Because this is the normal query generated outside the chain, so this external chain o

Super Rabbit optimization Wang software is a powerful system optimization software developed by Super Rabbit for beginners after three years of improvement. In the latest version 5.0, all Optimization-related functions are available, allowing anyone to easily connect to their own computers. Whether you are using Windows 95/98/me or Windows 2000/XP, the optimizer can automatically analyze the system and prov

custom initialization method, which has more limitations. Then it [class alloc] init] will be more convenient, of course, [class alloc] init] the design is due to historical reasons.Why do you write that? 1234567 - (instancetype)init { if (self = [super init]) { //Custom initialization } return self ; } We know that we are alloc returning a valid uninitialized object instance. For self alloc pointers that are return

also due to historical reasons.Why do you write that?- (instancetype) init{ if (self = [Super init]) { // Custom Initialization } return self ;}We know that Alloc returns a valid uninitialized object instance. For self is a pointer returned by Alloc and can be accessed within all method scopes.But for super, it's just a "compiler indicator" that tells the compiler to search for the impleme

This and super must be placed in the first row of the constructor, because the initialization action is done first.The first row in the constructor in the parent class also has an implicit super () statement, which points to the parent class of all classes, object./////////////////////////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////

1 /*2 Super Keyword:3 4 The Super keyword represents a reference to the parent class space. 5 6 The Super keyword works:7 1. When the child parent class has a member with the same name, the child class is accessed by default as a member of the subclass, and the members of the parent class can be accessed through the Super