Programming VIP

preface Network subsystem is the top priority of Linux kernel. Today, we start with the network card driver and start the exploration of the network subsystem. hardware environment Raspberry pie 3B + is equipped with Gigabit network card LAN7515, but it uses USB2 0 channel (the maximum theoretical speed is 480Mbps), and the official Etherne ...

Fluent API EF is also an ORM tool, and mapping is always the core part. Therefore, next, the mapping configuration of EF in Code First mode is introduced in detail. There are two ways to implement the mapping model through Code First: Data Annotation and Fluent API. Data Annotation needs to represent the mapping information such as primary k ...

1, Overview lwIP - A Lightweight TCP/IP stack The focus of the lwIP TCP/IP implementation is to reduce resource usage while still having a full scale TCP. This makes lwIP suitable for use in embedded systems with tens of kilobytes of free RAM and room for around 40 kilobytes of code ROM. Main features include: Protocols: IP, IPv6, ICMP, ND, ML ...

DateOnly and TimeOnly . NET 6 introduces two long-awaited types - DateOnly and TimeOnly. They represent the date or time portion of DateTime. // public DateOnly(int year, int month, int day) // public DateOnly(int year, int month, int day, Calendar calendar) DateOnly dateOnly = new(2021, 9, 25); Console.WriteLine(dateOnly); // Output: 25-Sep-2 ...

Application scenario: now the supermarket needs a set of supermarket cashier system. We need to make a set of cashier system. The demand will be very simple. When we think about it, it's just a matter of several text boxes. Enter the unit price and quantity, and then calculate it. However, if supermarkets launch discount activities in the later ...

Similar to TcpServer passively accepting connections using Acceptor, TcpClient actively initiates connections using Connector. Several key points used by Connector: In non-blocking network programming, the basic way to initiate a connection is to call connect(2), which indicates that the connection has been established when the socket becomes ...