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Preface I believe that many back-end development projects will encounter the need to write api documents, whether it is to provide better docking for the front-end, mobile end, etc., or in the future for the convenience of handover, it will be required to write api documents. There are many pain points in handwritten api documents: When the do ...

Data table structure design unique index ensures data uniqueness CREATE TABLE `mmall_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'User table id', `username` varchar(50) NOT NULL COMMENT 'User name', `password` varchar(50) NOT NULL COMMENT 'User password, MD5 encryption', `email` varchar(50) DEFAULT NULL, `phone` varchar(20) D ...

Preface Before talking about generics, the blogger wants to talk about the meaning of T, KV E, and? In Java generics. How many Xiaobai students are bothered by these things? It's not clear how many hhhhh. E - Element (used in a collection because it holds elements) T - Type (Java class) T represents the specified type at the time of the call ...

prospect JavaScriptIt's object-oriented programming, but it's different from other programming languagesJavaScriptObject-oriented is not dependent on abstract classes, but through prototype chains. stayC++andJavaUsenewCommand, will be called"class"Constructor for. While inJavascriptIn language,newThe command is not followed by a class, but by a ...

Foreword, about calculation properties The first time I saw the word calculation property was in the official Vue document Calculation properties and listeners In the section, the article describes the calculation attributes as follows: Expressions in templates are very convenient, but they are designed for simple operations. Putting too m ...

The combination of policy pattern and factory pattern can eliminate the multi nesting of code if else demand There is such a demand for under store stores. There are four levels for user customers: ordinary customers, vip customers, super vip users and exclusive vip users. When users purchase goods, different discount strategies are adopted f ...

Life is short, I choose Python Previous portal Little white learning Python (1): the beginning Little white learning Python (2): basic data types (I) Python (3): basic data type (2) Python (4): basic operation of variables Python (5): basic operators (1) Python (6): basic operator (2) Xiao Bai Xue Python (7): basic process control (Part one) P ...

---Resume content start--- part 1 format output function printf() and format input function scanf() ex2_1.cpp    #include <stdio.h> int main() { int x=1234; float f=123.456; double m=123.456; char ch='a'; char a[]="Hello, world!"; // Define an array a,String constants are stored continuously in the array hel ...

1 Definition Separate the construction of a complex object from its representation, so that the same construction process can create different representations. Type: creates a class pattern. Four elements: Product class: generally, it is a more complex object, that is to say, the process of creating an object is more complex, and generally th ...

6-1. Is there a string method or function in the string. String module that can help me identify whether a character is part of another large string? #You can use dir(sting) to view all methods and properties s='sbcdefg' s.find('cde') s.find('cde',0) s.find('cde',0,len(s)) 6-2. String identifier. M ...