After years of development framework, do you still know the pointer?
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
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
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
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
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
Basic Python learning
Use method to change the case of a string
Change the initial of a string to uppercase
>>> name = "ada lovelace"
Make all strings uppercase
Make all strings lowercase
Posted on Sat, 16 May 2020 23:07:20 -0700 by Harry57
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
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
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.
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
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
The preview of the first version has been completed. A ...
Posted on Wed, 13 May 2020 02:05:53 -0700 by warren