set function

  1. Self-encapsulated field (Self encapsulate field) p171 self-encapsulated Field There have been two completely different ideas on the field access method: one of them thinks that you can freely access the field in its class; another school

List function:Function: Convert character to list, example:List Basic functions:1. Element Assignment , example:Note: by list[0]= ' Hel ', if there is a value in the original position, it will overwrite the original.2. Shard Operations1) Display

This script can be used to count the number of connected IPs on a port, and to count all IPs connected to that end, the maximum number of IPs and times, and the status of the TCP connection.Involves Python reading network connection statistics and

JavaScript: S.O.L. I. D five principles-LSPPreface In this chapter, we will explain 3rd of The Five Principles of S.O.L. I. D In JavaScript language implementation, and The Principle of LSP (The Liskov Substitution Principle ). The opening/closing

A set set is a set of data that is unordered, has no coincident values, and can be iterated.Set functionSet can be cast to a set type of data through a set () function, or a set type data can be generated directly by assigning a value:>>> A =Set((1,2

Introduction to common Collections in Java Collections Framework, their features, applicable scenarios, and implementation principles JDK provides a large number of excellent sets for developers to use. Qualified programmers must be able to select

[Refactoring learning] 09. Rebuilding function calls and 09 function calls Previously, I wrote a function rebuild. Here I wrote a rebuild of the function call. The difference is that I want to write a function (or interface) that allows others to

Today, I have nothing to do in the company. I suddenly thought of writing the front-end framework of the shopping cart of the mall. Of course, I only have to add, delete, modify, and query the shopping cart here. Maybe it is not so complete, but the

Chapter 2 client Storage1. cookie① It was originally used to store session information on the client.1.1 restrictions① Cookie is bound to a specific domain name in nature. When a cookie is set and a request is sent to the domain name that creates it,

A colleague has been asking me about Javascript object-oriented things these two days. So, just write an article and let him see it, this article mainly aims to introduce Javascript object-oriented programming from a holistic perspective. (The

To judge whether it is to select two or more options. For example, if I go to a branch road in front of my house, as long as I know which road is right for the first time, I don't have to think about it any more next time or in the future, take that

jquery's parent (), parents (), Parentsuntil (), closest () are all looking up for the parent element, with different usageParent (): Gets a collection of elements that contain a unique parent element for all matching elements.Parents (): Walks up

I. oracle basic SQL statements and functions, and oraclesql Functions I. Data Definition Language (ddl) Data definition language (ddl) is used to change the database structure, including creating, changing, and deleting database objects. The Data

QPainter -- paint brush (QPen) and paint brush (QBrush), qpainter -- qpen Article Reprinted from: https://www.devbean.net/2012/11/qt-study-road-2-brush-pen/   As mentioned in the previous chapter, the Qt drawing system defines two key attributes

Implement simple js two-way data binding and js binding Bidirectional data binding refers to the ability to change the attributes of the bound object to the user interface, and vice versa. In other words, if we have a user object and a name

Source code of Vue listening data object changes, source code of vue listening object When listening for changes in data objects, the easiest thing to think of is to create a table that needs to be monitored, regularly scan its values, and perform

Object-oriented, basic mode, object literal mode, Factory mode, constructor mode, prototype mode, composite constructor and prototype mode, other modes see ebook: Dynamic prototype mode, parasitic constructor mode (not recommended), secure

first, what is the signalWe all know that with windows, when we can't end a program properly, we can force this process to end with the task manager, but how does it work? The same functionality is achieved on Linux by generating signals and

Note:This article has been modified longDescription: There are two types of properties in ECMAScript: Data properties and accessor properties. Property Descriptor 1. Data Property Description: When modifying or defining a property of an object, add

The official explanation for closures is that an expression (usually a function) with many variables and environments that bind these variables is also part of the expression. Features of closures:1. As a reference to a function variable, when the