Programming VIP

When we are doing WEB automation, we generally have to wait for the page elements to load before we can perform the operation, otherwise we will report the error that the elements cannot be found, which requires us to add the waiting time in some scenarios. We usually use three waiting methods: Forced waitingImplicit waitingDisplay wait 1, Fo ...

1. Why learn functional programming 1. With the popularity of react, functional programming has attracted more and more attention 2.Vue3 also began to use functional programming 3. Functional programming can abandon this 4. In the packaging process, we can better use tree shanking to filter useless code 5. Facilitate testing, make the code mor ...

Catalogue Using classes to represent structured data Object as data structure Data structure TensileData class Create an instance and assign it to data Restrict attributes to specific values Simplify interfaces with constructors On demand calculation data Display TensileData object Method of drawing stress versus strain diagram Tensi ...

Vue3 system introduction and project practice Comprehensive knowledge points + high matching projects, easy entry and in-depth Mastery Chapter 1 a preliminary study of Vue grammar A very classic method is used here: split()Method splits each character of a string object and treats each string as each element of the array reverse()Metho ...

1, Current limiting algorithm In high concurrency systems, there are three sharp tools to protect the system: caching, degradation and current limiting. This paper mainly introduces current limiting. There are three current limiting algorithms: 1. Counter algorithm Fixed windowsliding window 2. Token bucket algorithm3. Leaky bucket ...

User login authentication is a very common business in Web applications. The general process is as follows: The client sends the user name and password to the serverAfter the server-side verification is passed, save relevant data in the current session, such as login time, login IP, etc.The server returns a session to the client_ ID, which the ...

PHP Application of php annotation Comments are the interpretation and explanation of the code, and the comments will be ignored by the interpreter <?php /* Multiline text note */ ?> <?php //Single line text note ?> Initial experience of php program Each line of php code must end with an English semicolon Th ...

1, Simple use ① Swap two variables # a = 4 b = 5 a,b = b,a # print(a,b) >> 5,4   let's start by swapping two variables. This method is one of the simplest and most intuitive methods. It can be written without using temporary variables or applying arithmetic operations. ② Assignment of multiple variables a,b,c = 4,5.5,'Hello ...

There are three ways to stop threads in Java:Customize the interrupt identifier to stop the thread.Use the thread interrupt method interrupt to stop the thread.Use stop to stop the thread.The stop method is an expiration method modified by @ Deprecated, that is, it is not recommended to use. Because the stop method will directly stop the thread ...

catalogue 1. Title Description 2. Problem solving analysis 2.1 solution 1: two dimensional matrix simulation 2.2 solution 2: directly calculate the address 3. Code implementation 1. Title Description A given string s is arranged in a Z-shape from top to bottom and from left to right according to the given number of lines numRows. For ...