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Create three Vue components - index.vue (parent component), son1.vue (child component), son2.vue (child component) Set the path of the parent component in the router file (the child component does not need to set the route); Page conversions between parent and child components are not routed The parent component passes the d ...

1. Get the entire URL string To get the parameters in the URL, first we need to get the entire URL string. We use: http://www.zhihua.com/wap/tmpl/member/member.html? Token = Zhihua as an example. ① Get (or set) the protocol part of the URL: window.location.protocol //window.location.protocol set or get the protoco ...

Reflection mechanism in java Catalog1. The concept of reflection mechanism2. Base Class of Reflection3. Usage of reflection4. Examples of applications of reflection Author's introduction: A stack of learning notes, a person working hard The concept of reflection mechanism: In the run state, all the properties and methods of this class can be ob ...

Analysis example Startup class Application, using ClassPathXmlApplicationContext to load xml files /** * @author jianw.li * @date 2020/3/16 11:53 PM * @Description: TODO */ public class MyApplication { private static final String CONFIG_LOCATION = "classpath:application_context.xml"; private static final String BEAN_NAME = "hello"; ...

Object expansion Object development review: Object literal, object deconstruction, three dot operators Object name attribute Object's method name attribute, but there are two special attribute methods. 1. If it is a property method, it is obtained through the property object. // / / object // let obj = { // demo() {}, // //Characteristi ...

Wechat applet learning notes (VIII) music player (playlist) The playlist defaults to the first song. Click the recommended songs to add songs to the playlist for playing. When adding songs to the list, if the user clicks the same song, it will not be added to the list, but will play directly. Therefore, when adding songs to the list, you need ...

Let's briefly introduce the collection. Generally speaking, it's a scheme used to store multiple data. For example, we are a company's warehouse management. The company has a lot of goods that need to be managed. There are similar goods and different kinds of goods. In a word, they are many and messy. If we manage the warehouse according to th ...

Thank you for your reference- http://bjbsair.com/2020-03-27/tech-info/7084/ There are many ways of array de duplication. Let's take out three simple ways to learn; 1. Double FOR loop (compare the current item with each of the following items, focusing on the optimization of array collapse and split deletion) 2. Key value pairs of objects 3.in ...

1. xml.etree.ElementTree XML Manipulation API The ElementTree library provides tools for parsing XML using event-based and document-based API s, searching for parsed documents using XPath expressions, and creating new documents or modifying existing ones. 1.1 Parsing XML documents Parsed XML documents are represented in memory by ElementTree an ...

If you need to listen for property value changes, you can assign a callback function to observer. <say-Hello></say-Hello> <dom-module id="say-Hello"> <template> <h1>{{say}}</h1> </template> </dom-module> <script> Polymer({ is:'say-Hello', properties:{ say:{ t ...