JavaWeb-6, filter, listener

JavaWeb-6, filter, listener 1. Filter Is there such a pain when we write servlets? Every time, we need to set the page code at the beginning of the servlet. If there are fewer servlets in the project, it's OK. But if there are dozens or even hundreds of servlets in the project, it's a bit hard. At t ...

Posted by roygbiv on Tue, 23 Jun 2020 00:42:56 -0700

Java basic knowledge: object oriented

object-oriented 1. Definition of object-oriented Creating objects can be things or things. In the program, objects are used to map things in reality, and objects are used to describe the relationship between them.2, Features of object-orientedEncapsulation Encapsulation is the core idea of object-ori ...

Posted by tomlei on Mon, 22 Jun 2020 23:39:31 -0700

Vue basic knowledge summary (absolute classic)

Last night at 23:00, Vue, officially fired the first shot! In three and a half years, we will move forward to the whole stack, strive to become an architect within three years, and become the mainstay of the world's top 500 companies. fighting never stops. Come on! 1, Introduction Vue (pronunciat ...

Posted by André D on Mon, 22 Jun 2020 20:14:43 -0700

JS life from scratch -- BOM, DOM and events in JS

According to the previous reply, variables, operators, branches, loops and nested loops in JS. This time, Ben K will nag everyone about BOM, DOM and events in JS. 1, "Flower heart Radish" -- BOM 1. Shocked, why FFF group raised the torch to BOM -- Introduction to BOM BOM(Browser Object Mode ...

Posted by phpforever on Mon, 22 Jun 2020 19:58:00 -0700

Python notes - special exercises and answers

1. Output hello world on the screen print("hello world") 2. Try to define several variable types int type float type bool type string type a=1 b=1.0 c=2-1>2 d="f" print(type(a),type(b),type©,type(d)) 3. Try adding numeric types to see the result types a=1 b=1.0 print(type(a+b)) 4. Get the string e ...

Posted by evilcoder on Sun, 21 Jun 2020 22:04:38 -0700

What does Python mean by closures?

Closure is a common concept in programming language, but to be honest, the term is a bit obscure. After checking the information on the Internet for half a day, I still don't know what to do. What I wonder is: what kind of problem is this thing used to solve? Or what is his role? First of all, function After consulting many materials, the summa ...

Posted by saradrungta on Sun, 21 Jun 2020 21:57:13 -0700

Insight into details! react 16.8.6 source code Analysis-1 error reporting and warning

preface As a front-end page and demand shredder, it can achieve limited improvement by repeating the same business requirements in daily work. In order to jump out of this mountain and open up a new vision, I suggest you read the source code of the top open source library on the market. This is a grea ...

Posted by SBro on Sun, 21 Jun 2020 20:12:41 -0700

Analysis and prediction of Telecom user churn

Analysis and prediction of Telecom user churn 1, Project background 2, Analysis purpose 3, Data source 4, Ask questions 5, Analysis process 6, Understanding data 1. Feature understanding 2. Import data 3. Data transformation 7, User churn analysis 1. Analysis of loss proportion 2. User attribute a ...

Posted by Envex on Sun, 21 Jun 2020 20:06:40 -0700

Insight into details! react 16.8.6 source code analysis - 2 component construction and acquisition call stack

preface As a front-end page and demand shredder, it can achieve limited improvement by repeating the same business requirements in daily work. In order to jump out of this mountain and open up a new vision, I suggest you read the source code of the top open source library on the market. This is a grea ...

Posted by fox_m on Sun, 21 Jun 2020 19:44:23 -0700

From scratch, teach you how to use native JS+CSS3 to realize the game of fruit machine

Project experience address Free video tutorial Introduction to the game Lucky fruit machine is an arcade game. The game interface is made up of 24 squares, each of which has a different fruit figure and a small lamp. Players use the game currency to select the target they want to bet on. When they press the start button, the small lamp starts ...

Posted by thewooleymammoth on Sun, 21 Jun 2020 19:42:43 -0700