What is the use of queue?
A queue is an ordered linear table. The insertion and deletion operations of the queue are performed at two different endpoints of the linear table. In real life, queue applications can be seen everywhere, such as queuing to buy things and hospitals. Registration systems, etc. all use a queue structure.
Queue
Queue (Queue) is an ordered linear list, queue insertion and deletion The operations are performed on two different endpoints of the linear table
Usually, the end where the data enters is called the "queue tail", the end where the data goes out is called the "queue head", and the end where the data elements enter the queue is called The process is called "enqueuing" and the process of dequeuing is called "dequeuing".
Operation set: generate queue, determine whether it is full, push into the queue, determine whether it is empty, remove the queue
Implementation method: sequential storage, chain storage
In real life, queue applications can be seen everywhere, such as queuing to buy XXX, hospital registration systems, etc., which all use the queue structure.
Take queuing to buy tickets, for example, all people line up in a line, and those who arrive first go to the front, and those who arrive later can only wait in line from the end of the line. Everyone in the line must wait until they After everyone in front has successfully purchased their tickets and exited from the front of the queue, it is their turn to buy tickets. Isn't this a typical queue structure?
The above is the detailed content of What is the use of queue?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1386
52
Deque in Python: Implementing efficient queues and stacks
Apr 12, 2023 pm 09:46 PM
deque in Python is a low-level, highly optimized deque useful for implementing elegant and efficient Pythonic queues and stacks, which are the most common list-based data types in computing. In this article, Mr. Yun Duo will learn the following together with you: Start using deque to effectively pop up and append elements. Access any element in deque. Use deque to build an efficient queue. Start using deque to append elements to the right end of a Python list and pop up elements. The operations are generally very Efficient. If time complexity is expressed in Big O, then we can say that they are O(1). And when Python needs to reallocate memory to increase the underlying list to accept new elements, these
How to use Supervisor to manage ThinkPHP6 queue?
Jun 12, 2023 am 08:51 AM
As web applications continue to develop, we need to handle a large number of tasks to maintain the stability and availability of the application. Using a queuing system is one solution. ThinkPHP6 provides a built-in queue system to manage tasks. However, handling a large number of tasks requires better queue management, which can be achieved using Supervisor. This article will introduce how to use Supervisor to manage ThinkPHP6 queues. Before that, we need to understand some basic concepts: queue system queue system is
Application of queue technology in message delay and message retry in PHP and MySQL
Oct 15, 2023 pm 02:26 PM
Application summary of queue technology in message delay and message retry in PHP and MySQL: With the continuous development of web applications, the demand for high concurrency processing and system reliability is getting higher and higher. As a solution, queue technology is widely used in PHP and MySQL to implement message delay and message retry functions. This article will introduce the application of queue technology in PHP and MySQL, including the basic principles of queues, methods of using queues to implement message delay, and methods of using queues to implement message retries, and give
Analysis and optimization strategies for Java Queue queue performance
Jan 09, 2024 pm 05:02 PM
Performance Analysis and Optimization Strategy of JavaQueue Queue Summary: Queue (Queue) is one of the commonly used data structures in Java and is widely used in various scenarios. This article will discuss the performance issues of JavaQueue queues from two aspects: performance analysis and optimization strategies, and give specific code examples. Introduction Queue is a first-in-first-out (FIFO) data structure that can be used to implement producer-consumer mode, thread pool task queue and other scenarios. Java provides a variety of queue implementations, such as Arr
Implementation plan of queue task monitoring and task scheduling in PHP and MySQL
Oct 15, 2023 am 09:15 AM
Implementation of queue task monitoring and task scheduling in PHP and MySQL Introduction In modern web application development, task queue is a very important technology. Through queues, we can queue some tasks that need to be executed in the background, and control the execution time and order of tasks through task scheduling. This article will introduce how to implement task monitoring and scheduling in PHP and MySQL, and provide specific code examples. 1. Working principle of queue Queue is a first-in-first-out (FIFO) data structure that can be used to
In Java, what is the difference between add() method and offer() method in queue?
Aug 27, 2023 pm 02:25 PM
Queue in Java is a linear data structure with multiple functions. A queue has two endpoints and it follows the first-in-first-out (FIFO) principle for inserting and deleting its elements. In this tutorial, we will learn about two important functions of queues in Java, which are add() and Offer(). What is a queue? Queue in Java is an interface that extends the util and collection packages. Elements are inserted in the backend and removed from the frontend. Queues in Java can be implemented using classes such as linked lists, DeQueue, and priority queues. A priority queue is an extended form of a normal queue, where each element has a priority. The add() method of the queue is used to insert elements into the queue. It will define the element (as
What is the principle and implementation of the PHP mail queue system?
Sep 13, 2023 am 11:39 AM
What is the principle and implementation of the PHP mail queue system? With the development of the Internet, email has become one of the indispensable communication methods in people's daily life and work. However, as the business grows and the number of users increases, sending emails directly may lead to server performance degradation, email delivery failure and other problems. To solve this problem, you can use a mail queue system to send and manage emails through a serial queue. The implementation principle of the mail queue system is as follows: when the mail is put into the queue, when it is necessary to send the mail, it is no longer directly
Queues in the Yii framework: Handling asynchronous operations efficiently
Jun 21, 2023 am 10:13 AM
With the rapid development of the Internet, applications have become increasingly important to handle large numbers of concurrent requests and tasks. In such cases, handling asynchronous tasks is essential as this makes the application more efficient and better responsive to user requests. The Yii framework provides a convenient queue component that makes handling asynchronous operations easier and more efficient. In this article, we will explore the use and advantages of queues in the Yii framework. What is a Queue A queue is a data structure used to handle data in a first-in-first-out (FIFO) order. Team