back end programming

1. Dot to point The point is the data link layer, because the data link layer is responsible for directly connected to the communication between the two nodes, a node of the data link layer to accept the network layer of data and encapsulation, the data frame from the link to the next node adjacent to it. end-to-end is the transport layer, because both TCP and UDP protocol, it is responsible for the upper-

temporary variable when writing the code, and then calculate the sum of this temporary variable and 1. Imperative programming is the mainstream programming paradigm. Almost all the code we write belongs to the imperative programming paradigm. 2) Declarative Programming ): It emphasizes that program code simulates the

The reliability of data transmission is guaranteed by the point-to-point and the end-to-end of the transmission layer in the link layer and the network layer. Point-to-Point is based on MAC address or IP address, refers to a device to send data to another device, which refers to direct-attached devices including network cards, routers, switches. End-to-

JavaScript specification for front-end coding style specifications and front-end javascriptJavaScript specification global namespace pollution and IIFE Always wrap the code into an IIFE (Immediately-Invoked Function Expression) to create an independent and isolated definition domain. This action prevents global namespace contamination. IIFE also ensures that your code is not easily modified by the code in o

Request Process:User requests---〉django routing system---) distributed to different views function according to the URL to do the corresponding processing----) return HTML format string (need to dynamically request the data into the database to get into the HTML file)First, Django Project initializationSecond, configure the database, generate dataThird, configuration url.py fileFour, configure the Views view function:Five, the programming HTML file:Ac

Article Introduction: JavaScript developers deserve a collection of 7 resources. Web developers often expect themselves to be professional in every aspect of the web, and JavaScript developers are no exception. JavaScript didn't seem so popular a few years ago, but now JavaScript can be said to be the "top citizen" of the Web development community, and there are plenty of resources for JavaScript. I've been using JavaScript recently, including the front

Comparison (transferred from Baidu Experience)End-to-end vs. point to Dot is for the relationship between the devices that are transmitted across the network. End-to-end transmission refers to before the data transmission, after a variety of switching equipment, at both ends of the device asked to establish a link, the

Compared to the previous years of low-priced fighting, in 2015, the eyes of domestic handset manufacturers focused on the middle and high-end market.After 5 years of rapid development, China's mobile phone market has entered the smart phone stock replacement period, the stock users tend to more high-end product iteration; Therefore, for domestic handset manufacturers, the opportunity to the high-

In the previous article I talked about the front and back of the separation of some views, this view is from a macro point of view, no concrete landing to achieve, today I will continue the topic of the previous article, from the front-end of the architecture design point of view of the front-end separation of a specific implementation of the program and I originally conceived a great change, But the core i

Thoughts on front-end framework and front-end class library in Web Development This article mainly introduces some ideas about front-end frameworks and front-end class libraries in Web development, this article explains the misunderstanding of the front-end framework, the di

This article mainly introduces some ideas about front-end frameworks and front-end class libraries in Web development, this article explains the misunderstanding of the front-end framework, the difference between the front-end framework and the front-end class library, and t

In 1988, Van jacbson pointed out the shortcomings of TCP in controlling network congestion, and proposed "slow start" and "Congestion Avoidance ".Algorithm. The TCP Reno version that appeared in 1990 added the "Fast retransmit" and "Fast Recovery" algorithms, this avoids the use of the "slow start" algorithm when network congestion is not serious, resulting in excessive reduction of the size of the sending window. In this way, TCP congestion control is composed of the four core components. In re

　　 In C language, besides the 8-bit char type, there are also 16-bit short type, 32-bit long type (depending on the specific compiler), for a processor whose digits are greater than 8 bits, for example, for a 16-bit or 32-bit processor, because the register width is greater than one byte, there must be a problem of how to arrange multiple bytes. Therefore, the large-end storage mode and the Small-end