C × BCL first level pointer and second level pointer

After years of development framework, do you still know the pointer?   1: Background 1. Story telling More advanced languages are played, and many people may forget about pointer or assembly. This article will talk about pointer with you. Although pointer is not recommended in C, can you say that pointer is not import ...

Posted on Wed, 20 May 2020 23:05:56 -0700 by mattastic

Jingdong express home-to-door Collection - online order API interface development

preface In recent years, the scale of e-commerce transactions in China has become larger and larger, online orders are more and more, and the situation of goods return and exchange is more and more common. Return and exchange is an important part of online shopping process, and also an important aspect of reflecting the service level of e-comm ...

Posted on Wed, 20 May 2020 04:56:39 -0700 by burtybob

Java server configuration for WeChat official account

WeChat official account development server configuration Because the company web page needs to call the official account number api, so it makes special records. Because the IP address obtained by wechat server is not fixed, you need to call api and configure the server address 1. WeChat public platform configuration To configure the serve ...

Posted on Tue, 19 May 2020 04:40:02 -0700 by werty37

Android Learning Service Foundation

Android Service Service (service) It is one of the four components in Android. It can run in the background for a long time. The service does not need to provide a user interface. Even if the user switches to another application, the service can still run in the background. 1.Service Creation of 1.Service Creation of Service creatio ...

Posted on Tue, 19 May 2020 04:29:48 -0700 by George W. Bush

Loading BeanDefinition into Spring's IOC

This article mainly analyses the loading of BeanDefinition in spring, for which we will specially analyze it in later articles.BeanDefinition is part of the Spring Bean module and is for spring beansUnified abstract description defines interfaces. We know that beans are defined in spring in many ways, such as XML, annotations, and custom tags. ...

Posted on Mon, 18 May 2020 09:51:49 -0700 by rilitium

Python syntax foundation of day

Basic Python learning day_02 Use method to change the case of a string Change the initial of a string to uppercase >>> name = "ada lovelace" >>> print(name.title()) Ada Lovelace Make all strings uppercase >>> print(name.upper()) ADA LOVELACE Make all strings lowercase >>> print(name.lower()) ada lovelace ...

Posted on Sat, 16 May 2020 23:07:20 -0700 by Harry57

Detailed explanation of common sql statements in MySQL database operation add, delete, change, query, comment, fuzzy query, multi table linkage, regular expression, etc

catalog 1. Single line comments in SQL statements 2. Multiline comment 3. Create a new database 4. Delete database 5. Create table 6. Delete data table in MySQL 7.MySQL insert data 8.MySQL query data 9.MySQL UPDATE records 10.MySQL DELETE statement delete records 11.MySQL LIKE clause fuzzy query 12.MySQL UNION operator union query ...

Posted on Sat, 16 May 2020 03:43:33 -0700 by terandle

The concept and simple implementation of C-SERIAL communication

Recently, in the research of serial communication, there are several important concepts. RS-232 is suitable for the connection between PC and upper computer. RS-232 is only limited to point-to-point communication between PC serial port and equipment. It is very simple to connect. Because serial communication is asynchronous, that is to say, you ...

Posted on Thu, 14 May 2020 01:13:55 -0700 by Yeti

The most complete data type conversion method of Python 3 is sorted out, which can be collected for manual use

This paper is based on python3.8 Version, summarizes the direct conversion rules and methods of various data types. It's quite complete. You can collect it as a manual to check.   summary Data type conversion refers to the conversion of one data from the original type to another type by some means. For example, we convert the string "123&q ...

Posted on Wed, 13 May 2020 23:57:26 -0700 by richardwarren

Using the code cloud (gitee) to make a free chart bed V2.0

effect preface The first edition has been completed. This article is based on the first edition. For detailed articles of the first edition, please refer to > >https://blog.csdn.net/pyfysf/article/details/103990753 https://www.cnblogs.com/upuptop/p/12197125.html The preview of the first version has been completed. A ...

Posted on Wed, 13 May 2020 02:05:53 -0700 by warren