Programmer Think

When Vue is updating the rendered element list with v-for, it defaults to the in place reuse policy. If the order of data items is changed, Vue will not move DOM elements to match the change of data items, but simply reuse each element here, and ensure that it displays each element that has been rendered under a specific index. ...

This article only records some common operation methods of fastjson and jackson, but not for comparison. There are a lot of comparison articles written on the Internet. 1. Object to Json string // fastjson String objStr = JSON.toJSONString(obj); // The default attribute to be removed ...

We can add attributes to iOS classification through runtime To add attributes, remember a few keywords, 1 1. First, we use @ property to declare a property in. h like a normal class ///xxx+CH.h. here is the. H file of CH classification of xxx class @interface xxx (CH) @property (nonatomic ,strong) NSStri ...

Manual wheels: write a log component Intro There are many log components, such as log4net / nlog / serilog / microsoft.extensions.logging, etc. How to switch log components without modifying the code, just switch different loggingProvider s, reduce the cost of switching log framework, and write a log component for different log framework in thi ...

Recently, I studied runtime. I saw a great God written runtime on the Internet to manually implement KVO. I tried it myself But there are some problems. I want to ask you to post for the first time. Structure: Listen for the name of the people (inherited from the NSobject) class in the ViewController. Monitor class NSObjec ...

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.sp ...

JavaScript string de duplication Method: write on the prototype chain, use the characteristics that the attributes of the object cannot be the same to de duplicate, and add each character of the string as the attribute name of the object (an object cannot have two attributes with the same name). Code implementation: // Enc ...

Hyperlink of the original text, blogger address: http://blog.csdn.net/difffate. https://blog.csdn.net/difffate/article/details/77945239 The default columns displayed by PowerDesigner are Name and type, as shown below: Now you need to show the Comment column to make the ER diagram clearer. However, checking Comment in PowerD ...

Train of thought: Obtain the background data through VueResource, and check whether the debugging of browser console is successful. Use the hook function mounted to ensure that when all DOM are mounted on the page, request again Write the layout of the page, set the interface, and render the page through v-for Data format of ...

📦 this article and sample source code have been filed in javacore 1, Introduction to atomic variable class Why atomic variable classes are needed To ensure thread safety is an important problem to be solved in Java Concurrent Programming. Java ensures the consistency of multithreaded data by three features: atomicity, visibility and orderlin ...