How to implement traversal of irregular multi-dimensional arrays in JS
This article mainly introduces the method of JS to implement traversal of irregular multi-dimensional arrays, involving the implementation and usage skills of recursive traversal of javascript arrays. Friends in need can refer to it
The example of this article tells the implementation of JS to traverse irregular multi-dimensional arrays Methods for regular multidimensional arrays. Share it with everyone for your reference, the details are as follows:
Go directly to the text:
Sometimes when we process data, we may encounter some irregularities (unpredictable data structures), then get How do we traverse this kind of data? For example:
var data= { a: { one: 1, two: 2, three: {four:'2',five:'4'} }, b: { six: 4, seven: 5, eight: 6 }, c: { nine: 7, ten: 8} }
For example, the data above (the actual situation is that this data will have various unpredictable changes), if you want to traverse this kind of data, you cannot traverse it with a simple for in.
In fact, this kind of data traversal is also simple. Using the recursive method can perfectly solve this problem.
The code is as follows:
function traverse(obj) { for (var a in obj) { if (typeof(obj[a]) == "object") { traverse(obj[a]); //递归遍历 } else { console.log(a + "=" + obj[a]); //如果是值就显示 } } } traverse(data)
Finally, we only need to call this method to When obj is passed in, the entire data is successfully traversed
The results of this example are as follows:
The above is what I compiled for everyone. I hope it will be useful to you in the future. Everyone is helpful.
Related articles:
Introduction to the 4 common request methods of ajax in jQuery
How to use native ajax to process json strings
Let’s talk about our views and understanding of Ajax form submission
The above is the detailed content of How to implement traversal of irregular multi-dimensional arrays in JS. For more information, please follow other related articles on the PHP Chinese website!

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.


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

SublimeText3 English version
Recommended: Win version, supports code prompts!

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Linux new version
SublimeText3 Linux latest version

Dreamweaver CS6
Visual web development tools