Programmer Group

Executor is not recommended The Executors class provides us with various types of thread pools. The frequently used factory methods are: public static ExecutorService newSingleThreadExecutor() public static ExecutorService newFixedThreadPool(int nThreads) public static ExecutorService newCachedThreadPool() public static ScheduledExecutorServic ...

Uni app image lazy loading function Lazy loading of pictures is realized, and there are always only 3 pictures in the display array. While sliding up and down to increase, the first one is deleted. You can specify which page of the total picture to load from. thinking To achieve the animation effect when sliding up and down, I use the swipe ...

1. Built in objects There are three kinds of objects in JavaScript: custom object, built-in object and browser object The first two objects are the basic content of JS and belong to ECMAScript; The third browser object is unique to JS. JS API explains that built-in objects refer to some objects of JS language. These objects are used by devel ...

Summary of zset command of redis zset(sorted set) Redis zset, like set, is also a collection of string elements, and duplicate members are not allowed. The difference is that each element is associated with a score of type double. redis sorts the members of the collection from small to large through scores. The members of zset are unique, ...

Chapter 55 SQL command INSERT (4) Embedded SQL and dynamic SQL examples The following embedded SQL example creates a new table SQLUser.MyKids. The following example uses INSERT to populate this table with data. After inserting the sample, an example of deleting SQLUser.MyKids is provided. ClassMethod Insert2() { &sql( CREA ...

Common solutions to mobile terminal layout are: 1.flex flexible layout 1) The height is fixed, the width is adaptive, and px is used as the unit of elements. 2) As the screen width changes, the page will also change. The effect is similar to the fluid layout of the PC page. When the width needs to be adjusted, just use the responsive layout ...

In the process of page development, it is often necessary to dynamically add elements and bind related events to this element. In this case, it is generally necessary to add related attributes to the elements and then write the event functions of these elements. How do dynamically added elements bind events? Native JavaScript There are two ma ...

replicaset controller analysis Introduction to replicaset controller Replicaset controller is one of many controllers in Kube controller manager component. It is the controller of replicaset resource object. It monitors replicaset and pod resources. When these two resources change, it will trigger the replicaset controller to tune the corresp ...

JSON 1, What is JSON? The full name of JSON is JavaScript object notation. JavaScript object notation is a data structure that replaces XML. Now JSON is mostly used to store and exchange the syntax of text information for data transmission. JSON is smaller, faster and easier to parse than XML. Moreover, the JSON parser and JSON library suppor ...

preface Due to the needs of the project, binary files such as audio and images need to be stored. These files cannot be stored in the database. HBase has been used for audio storage before. However, HBase's api is too complex to use There is also fastdfs for file storage, but the installation and configuration is very complex. Later, I found ...