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include this use case. B)Second,When a use case has too many functions and events flow through complicated conditionsWe can also stream a certain event.As an included use case to simplify the description. 2, Extended relationships 1)Under certain conditions, add new behaviors to existing use cases. The obtained new use cases are calledExtended use cases(Extension)The original use case is calledBasic Use Cases(Base)The Relationship Between Ext

Descriptions of phpwhile loop control instances and while instances. The phpwhile loop control instance explains that while loop is the simplest loop in PHP. its basic format is: while (expr) {statement} or while (expr ): statementendwhile php while loop control instance description, while instance description While loop is the simplest loop in PHP. its basic format is: while (expr){ statement} Or while

Detailed description of the progress bar implemented by PHP, and detailed description of the php progress bar. The progress bar of PHP implementation is described in detail. the progress bar of php is described in this article. For your reference, I would like to explain the progress bar effects implemented by PHP and the php progress bar details when collecting data. This article describes the progress ba

Detailed description of DNN7 website system requirements and deployment guide, and detailed description of dnn7 Deployment Guide This Installation Guide applies to local testing and host installation of DNN6.x and DNN7.x. Recently, many friends in the QQ Group asked me about the installation and running of DotNetNuke. In order to give you a better understanding of the DNN installation method, I will give a

it if I try to get the time. Let's see the video demonstration.How to convert the RVA and file offset?When processing PE files, any RVA must be converted to a file offset before it can be used to locate and access the data in the file, but the conversion cannot be completed using a simple formula. In fact, the only available method is the most stupid one:Step 1: cyclically scan the block table to obtain the starting RVA of each block in the memory (according to the virtualaddress field in image

MJRefresh framework usage and description, mjrefresh framework Description 1. MJRefresh class explanation. 1. The base category of all MJRefreshComponent refresh controls. (component: component, component) 2. MJRefreshNormalHeader default drop-down refresh control 3. MJRefreshAutoNormalFooter's default pull-on refresh control pull-down refresh control adaptive under the page content 4. MJRefreshAutoGifFoot

Detailed description of content attributes of CSS3 and detailed description of css3content There are four main pseudo elements in CSS: before/after/first-letter/first-line. In the before/after pseudo element selector, there is a content attribute, insert content on the page.Insert plain text Content: "inserted article", or content: none does not insert contentHtml: Css H1: after {content: "content inserte

Detailed description of mount command usage (Linux) and detailed description of mount usage Linux is an excellent open-source operating system, which can run on various computer systems, from large to small, with the increasingly mature and stable linux system and its unique advantages of open source code, linux has been widely used in the world. Nowadays, many enterprise computer systems are a hybrid syste

A brief description of the C ++ object model: Memory Distribution of C ++ objects and a brief description of the Object ModelIn C ++, there are two types of member variables: static and non-static. There are three member functions: static, non-static, and virtual. So how do they affect the distribution of C ++ objects in the memory? What is the memory distribution when inheritance exists? The following is a

Detailed description of the progress bar implemented by PHP, and detailed description of the php progress bar This article describes the progress bar of PHP implementation. We will share this with you for your reference. The details are as follows:When collecting data, I wanted to use php to implement a progress bar function. Google found a suitable code. The following code is directly used:

Detailed description of the differences between iframe and frame, and detailed description of iframeframe When you get started, you must note that HTML5 does not support frame, and iframe only has the src attribute. I. advantages and disadvantages of using iframe Advantages: 1. It is convenient for programs to call static pages;2. Separation of pages and programs; Disadvantages: 1. iframe: style/script requ

Detailed description of the javascript Execution Environment and scope, and detailed description of javascript I recently reread "javascript advanced programming 3" and thought I should write some blogs to record some of my learning knowledge. Otherwise I will forget it. Today we will summarize the js execution environment and scope. First, let's talk about the execution environment I. Execution Environment

Detailed description of VueJS frontend for frontend and backend separation and detailed description of vuejs frontend Separation Preface The front-end can use any framework. Here we select the small vuejs. The functions to be implemented are simple: 1. the logon function successfully saves the token returned by the server to a local device. 2. Use a header with a token to access a server resource This lab e

Detailed Description: Vue uses the command line to build a single page application, and detailed description of vue command line construction Use command lines to build a single page application Let's take a look at the final result: Outline 1. Download node, git, npm 2. Use command line to install a project 1. Download Tool You can download node and git on the official website. The following describes how

Detailed description of static resource processing in Nodejs and detailed description of nodejs static Resources Preface When I started to use Nodejs to write simple web servers, I always felt something was missing. It turns out that I always output Hello World on the page! Ah, It Works. No static resources related to CSS and JS references have been processed yet. At first, I thought it would be very easy t

Detailed description of vue nested route-query transfer parameters, detailed description of vue Nested-query In nested routing, we often encounter the parent route passing parameters to the Child route. There are two methods to pass parameters through query or params. Index.html Main. js also displays the parent route through redirection. Import Vue from 'vue 'import VueRouter from 'vue-router' vue. use (V

Php mysql database operation class (instance description), mysql instance description Next, let's talk about the overall idea. Encapsulation of the entire class, including a private attribute $ conn for connecting to the database and several operation functions. $ Conn: when an object is instantiated, a resource-based connection handle is returned after the constructor processes the input parameters. Then,

Detailed description of how to customize exceptions in the Python program, detailed description of python By creating a new exception class, programs can name their own exceptions. Exceptions are typically inherited from the Exception class, either directly or indirectly.The following is an instance related to RuntimeError. A class is created in the instance. The base class is RuntimeError, which is used to

Vue component watch attribute instance description, vuewatch instance description This article provides examples to share with you the specific code of the watch attribute of the vue component for your reference. The details are as follows: The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.

Detailed description of inheritance methods in JavaScript, and detailed description of javascript Concept of js inheritance The following two inheritance methods are commonly used in js: Prototype chain inheritance (inheritance between objects)Class inheritance (inheritance between constructors)Javascript is not as object-oriented as java does. js is object-based and has no class concept. Therefore, to impl