Found a total of 5975 related content
What to write in thinkphp m layer
Article Introduction:ThinkPHP is a popular PHP open source framework. It adopts the MVC design pattern and divides the application into three layers: model, view and controller. Among them, the model layer (M) is an important layer responsible for processing business logic and data storage. Therefore, during the development process, many developers have some questions about the writing of the M layer. This article will discuss this aspect. 1. The role of the M layer In the MVC model, the role of the M layer is to handle data storage and business logic. In an application, the M layer is usually responsible for completing the following tasks: 1. Binding business logic to
2023-04-17comment 0216
c语言阶层函数怎么写
Article Introduction:阶层函数是递归函数,它调用自身以分步解决问题。编写阶层函数需要:确定基例,进行递归调用,返回每个调用的结果。阶层函数的优点包括代码简洁、可解决复杂问题、体现递归思想。其缺点是可能占用大量堆栈空间,且效率不如某些非递归版本。
2024-05-25comment 0709
A brief analysis of whether the view layer can be written in Vue?
Article Introduction:Can the view layer be written in Vue? When developing a website or application, the view layer is an essential part. The main role of the view layer is to present data and interact with users. Vue is an excellent JavaScript framework that can be used to build the view layer. Compared with traditional web development, using Vue for development can greatly improve development efficiency and enhance user experience. Vue is an MVVM framework that well separates the view layer and data layer. It binds data and views through data binding technology, so that when data occurs
2023-04-07comment 0460
Is the bottom layer of vue written in node?
Article Introduction:The bottom layer of vue is not written in node, but developed based on the JavaScript language; vue is a progressive JavaScript framework for building user interfaces, which can better organize and simplify web development, and node is an engine based on "Chrome V8" JavaScript runtime environment.
2022-08-19comment 01158
Analysis of Python's underlying technology: how to implement file reading and writing
Article Introduction:Analysis of Python's underlying technology: How to implement file reading and writing, specific code examples are required. In Python programming, file operations are one of the most common and important operations. File reading and writing involves Python's underlying I/O technology. This article will explore how to use Python to implement file reading and writing operations, and provide specific code examples. 1. File reading Python provides a variety of methods for reading file contents. The most common ones include using the open() function and using the with statement. Use the open() function
2023-11-08comment 0519
How to write nodejs middle layer
Article Introduction:With the popularity of front-end and back-end separation, front-end frameworks and technologies are changing with each passing day. How to build a high-performance front-end architecture has become the focus of everyone's attention. One of the key links is how to build an efficient and stable middle layer. This article will introduce how to use Node.js to build the middle layer. 1. What is the middle tier? The middle tier is an independent server layer located between the front end and the back end. It can be used to handle data interaction and processing between the front-end and the back-end, reducing the pressure on the back-end server, while improving the user's response speed and user experience. 2. Why choose Node.
2023-05-28comment 0351
What are java three-tier architecture and DDD hierarchical architecture?
Article Introduction:Three-tier architecture The traditional three-tier architecture is mainly divided into business interface layer, business logic layer, and data access layer. Business interface layer: mainly the definition of API, including resource path definition, request message acceptance, response message return, request encoding, etc. The content of the definition; business logic layer: mainly does business logic processing, this layer includes data mapping DTO to VO, writing business core logic, combining different data warehouses, and doing business logic; data access layer: mainly doing data storage, including data mapping VO to PO, definition of data interface, writing of mapping XML. DDD layered architecture DDD layered architecture can also be called a four-layer architecture, which mainly consists of user interface layer, application layer, domain layer, and basic layer; user interface layer: responsible for displaying information to users and interpreting user instructions, such as
2023-05-15comment 02027
Practice and application of PHP7 underlying development principles: how to write high-performance PHP extensions
Article Introduction:Practice and application of PHP7 underlying development principles: How to write high-performance PHP extensions In modern web development, PHP is one of the most popular scripting languages. However, since PHP is an interpreted language, its performance often becomes the focus of developers. In order to improve the performance of PHP, a common approach is to use the underlying language for development by writing extensions. This article will explore the practice and application of PHP7's underlying development principles, focusing on how to write high-performance PHP extensions. Before we start writing PHP extensions, we need to
2023-09-09comment 0747
How to write jquery level selection
Article Introduction:With the continuous development and updating of Web front-end technology, jQuery has become the first choice of many front-end developers because jQuery is very powerful and easy to use, and can easily handle many common Web development tasks, one of which is hierarchical selection. In this article, we will introduce how to use jQuery’s hierarchical selectors. Hierarchical selectors allow us to select specific nodes in the DOM tree, such as selecting child elements or parent elements of a specific element. A hierarchical selector consists of selectors separated by a space character (' '). Each selector will restrict the selection set.
2023-05-14comment 0289
What is the abbreviation for media access control sublayer?
Article Introduction:The abbreviation of the medium access control sublayer is "MAC", which defines how data frames are transmitted on the medium; it solves the problem of how to allocate the right to use the channel when there is competition for the use of shared channels in the local area network. On links that share the same bandwidth, access to the connecting medium is on a "first come, first served" basis.
2021-02-01comment 06284
How to write a simple student dormitory floor adjustment system using Java?
Article Introduction:How to write a simple student dormitory floor adjustment system using Java? With the development of university life, student dormitory management has become more and more important. In order to improve the management efficiency of student dormitories, we can use Java to write a simple student dormitory floor adjustment system. This article will introduce how to use Java language to implement this system. First, we need to design the basic functions and structure of the system. The student dormitory floor adjustment system mainly includes the following functions: Student information management: including student name, student number, gender, and contact information
2023-11-02comment 0399
The perception layer is the layer of the Internet of Things architecture.
Article Introduction:The perception layer is the first layer of the Internet of Things architecture. The perception layer is composed of various sensors and sensor gateway architecture technology architecture diagrams, including carbon dioxide concentration sensors, temperature sensors, humidity sensors, QR code tags, RFID tags and readers. , cameras, GPS and other sensing terminals.
2020-09-25comment 028125
Revealing the underlying development principles of PHP8: How to use new features to improve code writing efficiency
Article Introduction:Revealing the underlying development principles of PHP8: How to use new features to improve code writing efficiency. PHP is a scripting language widely used in web development. Its simplicity and ease of learning make it the first choice for many developers. With the release of PHP8, the underlying development of the PHP language has many new features, which can greatly improve the efficiency of code writing. In this article, we will reveal the underlying development principles of PHP8 and give some code examples to help readers better understand how to take advantage of these new features. JIT compilerJ
2023-09-08comment 0560
Which layer does the IP protocol belong to?
Article Introduction:The IP protocol belongs to the network layer. IP refers to Internet Protocol, the abbreviation of Internet Protocol. It is a network layer protocol in the TCP/IP system (equivalent to the network layer of the OSI model). It can provide various protocol information to the transport layer, such as TCP, UDP, etc.; Next, IP information packets can be placed at the link layer and transmitted through various technologies such as Ethernet and Token Ring networks.
2022-11-23comment 011770
The underlying development principles of PHP8's new features: How to improve code writing efficiency through new features
Article Introduction:The underlying development principles of PHP8’s new features: How to improve code writing efficiency through new features Introduction: With the continuous development of technology, PHP, as a popular server-side programming language, is also constantly updated and evolved. PHP8, as the latest version of the PHP language, introduces many new features and improvements to improve the efficiency and performance of code writing. This article will focus on the underlying development principles of the new features of PHP8, and demonstrate through code examples how to use these new features to improve the efficiency of code writing. 1. Just-in-time
2023-09-08comment 0855
css层级选择器怎么写
Article Introduction:层级选择器可以精准选择文档树中特定元素及其后代元素,优先级较高,易于理解、选择嵌套元素和提升性能,但只能选择子元素,过度使用会影响代码维护性。
2024-05-23comment 0258
How to implement php middle layer url forwarding
Article Introduction:In today's web development, the use of middle tiers is increasingly common. The middle layer refers to adding a layer between the client and the server through some technical means to implement some specific functions or enhance the performance of the application. URL forwarding is one of the most common implementation methods in the middle layer. It can forward requests from different clients to different servers and return corresponding response results. In PHP development, it is also a common way to implement URL forwarding by writing middle-tier programs. This article will introduce how to use PHP to write
2023-04-21comment 0208
How to set up two levels of WordPress article page
Article Introduction:WordPress article pages can be set up with a dual-level structure to improve article organization and navigation. Here’s how to do it: Enable hierarchy: In your dashboard, go to Settings > Writing and check the “Enable parent section hierarchy” option. Create a parent level: Select "None" in the "Parent Section" drop-down menu, enter the parent level title and content, and publish. Create a sub-level: Select the parent level title in the "Parent Section" drop-down menu, enter the sub-level title and content, and publish. By doing this, the child level will be nested under the parent level.
2024-04-15comment 0890
Introduction to layui underlying methods
Article Introduction:The layui framework is a front-end UI framework written using its own module specifications. It follows the writing and organizational form of native HTML/CSS/JS. The threshold is extremely low and can be used out of the box. This tutorial introduces you to the underlying methods of the layui framework. I hope it will be helpful when you learn layui.
2019-12-21comment 02466
What is the bottom layer of tcp/ip
Article Introduction:The bottom layer of tcp/ip is the network interface layer. The network interface layer is located on the fourth layer. Since the network interface layer merges the physical layer and the data link layer, the network interface layer is not only the physical medium for transmitting data, but also the network layer. Provide an unmistakable line.
2021-01-11comment 012824