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introduction Similar to the drop-down box (combo box) combobox of TinUI, the list box also displays a number of selectable text segments to the user, calling the response function after the user clicks the selection, and passing the selected parameters, that is, the selected text segment text. So are these two components contradictory? Of ...

Article cataloguepreface1, Scene value2, Acquisition of scene valueprefaceThe scene value is the source of entering the applet, which is the way the user clicks into the applet. The scene value can be obtained through onLaunch or onShow methods in the app.For example, the scene value obtained is 1005, which means that the user searched the appl ...

prefaceTaking crawling github information as an example, this paper introduces the usage of Scrapy framework.Objective: according to github keyword search, crawl all search results. Specifically, it includes name, link, stars, Updated and About information.Project creationOpen the Terminal panel and create a project named powang's sketch:scrapy ...

Implement the simplest deadlock (Java version) ```java /** * @author wall * @date 2019/7/29 16:42 * @description Implement A deadlock: thread A obtains the lock held by thread B, and thread B obtains the lock held by thread A */ public class DeadLock { //Define two locks private static ReentrantLock lockA = new ReentrantLock(); ...

Angular life cycle practiceThe meaning of life cycle hooksIn Angular, the method of realizing the life cycle hook interface of components is to use the Angular framework to realize the time point of inserting business.What is the life cycle in official documentsThere is a chapter in the official document of Angular Lifecycle hooks To explain th ...

Reference to my official account Wechat applet custom dynamic tabBarSummarizes the use of dynamic tabBar officially recommended by the applet. Through their own practice and implementation, the problems that need to be handled when using dynamic tabBar (multi role and different tabBar dynamic rendering, tabBar automatic selection after page loa ...

I annotationAnnotations in java implement the annotation interface by default. Generally, when we customize annotations, we mainly use two meta annotations (the other two @ Documented and @ Inherited have not been used much). See below1.@TargetThe main limitation is the type of java element to which annotations can be applied ElementType.ANNOT ...

1. What makes generics? 2. Why use generics? 3. How to use generic [class, interface, method] 4. Limitations of generics. What makes generics?  1. Generic: when a class is defined, it does not set the data type for the attribute and method [return value, parameter] in the class. When you create an object of this class, you specify t ...

catalogue Class component Class building block Class definition code block Attribute code block Method code block Event code block Complete class Enumeration class Class component Class building block         MATLAB ® Organize the class definition code into modular code blocks separated ...

backgroundThe latest requirement is to embed h5 in the client webview and use vite2 X and vue3. When the first version was tested, it was found that after packaging, the total package size was more than 4M, so there was a lot of room for optimization.Tool chain descriptionCurrently vite2 X is packaged based on rollup, not esbuild. See hereUse r ...