老鸟进来讨论一下,数据结构与web开发
今天学了数据结构中的基础知识和链表。
感觉数据结构还是很巧妙的。
我之前所了解到的,一般都是web开发不怎么与数据结构打交道。
我想问的是,在web开发中,有没有一些功能,可以用巧妙的数据结构去实现?
如果有的话,请举例子,非常感谢。
------解决方案--------------------
呵呵,不需要理会数据结构的话,甲骨文就没用武之地了
最简单的例子就是无限分类,你怎么保存分类表,影响后续数据扩展的增删改查的算法
另外,服务器群(现在好像都叫云计算了)的负载平衡等等都需要一定的数学知识
偶是门外汉,只会向大门扔砖头,坐等楼下反对意见,哈哈
------解决方案--------------------
数据结构无所不在
因为他是从实践中提升出来的
你总是自救或不自觉的使用着“数据结构”
比如你使用的 php 数组就是一个哈希表
你网站上的匪类目录就是一棵树
关联查询就是在使用链表
.......
------解决方案--------------------
和数据结构最紧密的那就是算法。算法的核心就是时空转换(时间和空间)。而用何种算法是根据要实现的功能来决定的。其实你很多时候都在用着各种算法(比如排序算法、查找算法。。。)、数据结构(树、哈希表。。。)。只不过在php这种高级脚本语言中,只是调一个函数,或者利用语言自带的结构来实现了。
楼上提到的分类其实就是个树状结构,这是个微观的例子。我举个宏观的例子:sns系统、微博系统用户之间的关系、相关度。这些都要用到很多数据结构和算法的知识。
要说数据结构和算法用到最多的领域,那就是数据库开发了。你可以思考下,mysql底层是如何存储你插入的信息,使得通过那些简单的sql语句就可以查出你想要的数据。还有就是他的索引是如何实现的。
如果你以后更多的接触后端,那么分布式存储,分布式计算,这些都要用到大量数据结构和算法的知识。
------解决方案--------------------
php 数组就是一个哈希表、?还真不晓得的、本质呢,那字符串是什么呢
------解决方案--------------------
你找本《深入php》看,都有说的
------解决方案--------------------
准确的说,是c语言的一个struct。由这个struct来实现的哈希表、堆栈、队列、向量等多种结构。这就是php底层的c语言实现。
------解决方案--------------------
这是内功
《被撞破了的脸孔》:“他打不过老头的,老头有内功!”

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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