Vue3——Chapter Fourteen (Pinia: Vue Store Worth Your Love)
1. Introduction to Pinia
Pinia is a Vue-specific state management library that allows you to share state across components or pages.Pinia originated as an experiment to explore the next iteration of Vuex, and as such incorporates many ideas from the Vuex 5 core team discussions.mutation has been deprecated. They are often considered extremely ...
Posted by zeberdeee on Sat, 14 Jan 2023 16:08:32 +0300
[Node.js] Write a script that automatically organizes data into tables
forewordAfter the data is buried in the enterprise project, the buried event names need to be sorted into an Excel table for easy statistics. The goal is to convert the data on the left side of the figure below into the Excel table on the right side of the figure below:Considering that the buried point data on the left increases with the iterat ...
Posted by plaztic on Sat, 14 Jan 2023 10:08:33 +0300
MyBatisPlus study notes [part1]
MyBatis-Plus is an enhancement tool of MyBatis. On the basis of MyBatis, only enhancements are made without changes, and it is born to simplify development and improve efficiency.
1. Pre-work
1. Introduce dependencies.
<!--mybatis-plus-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-p ...
Posted by petethepirate on Sat, 14 Jan 2023 05:38:08 +0300
Codeforces Round #843 (Div. 2) A ~ C Solution
A1&A2 Gardener and the Capybaras
Title meaning
Simple version: A1 Hard version: A2 A string contains only two letters a and b. Please divide this string into three non-empty strings so that the lexicographical order of the second string is the largest or the smallest. The data range of the hard version requires that the problem be solved ...
Posted by cbullock on Thu, 12 Jan 2023 20:11:38 +0300
Dynamic evaluation of expressions
When we write software, we may face a requirement, such as executing an expression of a conditional statement. It goes without saying that it is Easy to execute directly in the code. There is an application scenario, such as opening the condition and expression of if to the interface for editing by the user, mainly editing the expression of if, ...
Posted by drag0n on Thu, 12 Jan 2023 03:01:23 +0300
Builder mode of design mode
1. Model motivation
Whether in the real world or in software systems, there are some complex objects that have multiple components, such as a car, which includes various parts such as wheels, steering wheels, and transmitters. For most users, there is no need to know the assembly details of these parts, and they will hardly use a single part, ...
Posted by andre_c on Wed, 11 Jan 2023 05:37:11 +0300
The underlying principle and simulation implementation of stack and queue of c++ stl
1. The use of stack
Second, the simulation implementation of stack
#define _CRT_SECURE_NO_WARNINGS 1
#pragma once
#include<vector>
#include<list>
//adapter pattern
namespace sk
{
template <class T, class Container = deque<T>>
class stack
{
public:
bool empty()const
{
return _con.empty();
}
size_t ...
Posted by scialom on Wed, 11 Jan 2023 05:02:44 +0300
Frontend - CSS Float
CSS float
1. Structural pseudo-class selector
Function and advantage: Function: Find elements according to their structural relationship in HTML Advantages: Reduce the dependence on classes in HTML, which is helpful to keep the code clean Scenario: Commonly used to find child elements in a parent selector Selector
<!DOCTYPE html>
...
Posted by shyish on Tue, 10 Jan 2023 23:01:58 +0300
Scala Basics: Variables, Strings, Data Types, Constants, and Identifiers
chapter goals
Master the definition and use of variables and stringsMaster the division of data types and the content of data type conversionMaster the keyboard entry functionUnderstand constants and identifiers in Scala
1. Output statement and semicolon
1.1 Output statement
Method 1: Newline output
Format: println(Write the data you wa ...
Posted by poppy on Tue, 10 Jan 2023 08:21:36 +0300
C++ Primer Plus Exercises and Answers - Chapter 16
Exercises are selected from: C++ Primer Plus (Sixth Edition) The content is for reference only, please correct me if there is any mistake!
Smart pointer template class
review questions
1. Consider the following class declaration:
class RQ1
{
private:
char * st; // points to C-style string
public:
RQ1() { st = new char [1]; ...
Posted by mike0193 on Tue, 10 Jan 2023 08:07:29 +0300