How to install and use Docker Compose on Ubuntu 20.04

Introduction: Docker Compose is a command-line tool through which you can define and arrange multi container Docker applications. This article will explain how to install the latest version of Docker Compose on Ubuntu 20.04. For image download, domain name resolution and time synchronization, please click Alibaba open source mirror station D ...

Added by SpaceLincoln on Tue, 15 Feb 2022 16:00:16 +0200

Summary of single linked list routine

21. Merge two sequential tables Input: l1 = [1,2,4], l2 = [1,3,4] Output: [1,1,2,3,4,4] There is nothing to say about using an empty node. class Solution: def mergeTwoLists(self, l1: ListNode, l2: ListNode) -> ListNode: dummy = ListNode() p = dummy while l1 and l2: if l1.val < l2.val: ...

Added by twister47 on Tue, 15 Feb 2022 15:56:13 +0200

Array: question brushing record

Overview of knowledge points:     1. Sum of two numbers: Given an integer array , nums , and an integer target value , target, please find the , and the , integers with the target value , target , in the array and return their array subscripts. You can assume that each input will correspond to only one answer. However, the same e ...

Added by cuvaibhav on Tue, 15 Feb 2022 15:34:49 +0200

SpringBoot project initialization

catalogue 1. Create the working directory structure and modify it to yml file. 2. Unified web return object R type. 3. Configure Swagger. 4. Create a custom exception class: 5. Streamline the exception message returned to the front end: 6. Database and tomcat server configuration: 1. Configure tomcat server 2. Configure mySQL 3. Config ...

Added by fredi_bieging on Tue, 15 Feb 2022 15:18:28 +0200

vue uses keep alive to cache page optimization projects

concept Keep alive yes Vue When it wraps dynamic components, it caches inactive component instances instead of destroying them. Similar to transition, keep alive is an abstract component: it does not render itself as a DOM element or appear in the parent component chain. effect In the process of component switching, the switched components a ...

Added by fert on Tue, 15 Feb 2022 15:15:57 +0200

Face + + realizes face detection in the way of flow

The following steps can be used for face detection:Load the model file and initialize the interfaceObtain authorizationCall face detection to obtain key pointsNotification draw keyRelease interface resourcesSteps 3 and 4 here are repeated after receiving the camera data. We can abstract these steps into data flow for encapsulation. Face + + con ...

Added by kaser on Tue, 15 Feb 2022 15:04:40 +0200

[java notes] class inheritance

catalogue Characteristics of inheritance relationship: Three variables have the same name: The characteristics of calling member methods in inheritance: override of methods in inheritance: Preserve the functionality of the method of the parent class when overridden Access characteristics of construction methods in inheritance: super keyw ...

Added by avatar.alex on Tue, 15 Feb 2022 15:01:00 +0200

Ten minutes take you to understand multithreading - multithreaded teamwork: synchronous control

Multithreaded teamwork: synchronous control Synchronization control is an essential means for concurrent programs. The previously introduced keyword synchronized is one of the simplest control methods, which determines whether a thread can access critical zone resources. At the same time, object Wait() method and object The notify () method pl ...

Added by mindrage00 on Tue, 15 Feb 2022 14:51:09 +0200

Summary of new features of EF Core 6

In this article, I will focus on the enhancement of LINQ query function in EF Core 6. This is the third article in the summary of new features of EF Core 6: Summary of new functions of EF Core 6 (I) Summary of new functions of EF Core 6 (II)​​​​​​​ Summary of new functions of EF Core 6 (III) 1. Better support for GroupBy query EF Core 6. ...

Added by temidayo on Tue, 15 Feb 2022 14:39:13 +0200

Member management applet actual development 07 page Jump

In the previous section, we introduced the life cycle functions and customization methods in low code. In this section, we introduce the page Jump in low code. Page Jump It is relatively simple to realize page Jump in low code. Directly add behavior to the component and call the jump method of the platform. Open the application editor, select ...

Added by stephaneey on Tue, 15 Feb 2022 14:33:59 +0200