jquery can traverse the array array. Methods: 1. Use the for loop statement to traverse the array; 2. Use the "for in" loop statement to traverse the array; 3. Use the forEach() method to traverse the array; 4. Use each( ) method to traverse the array; 5. Use the map() method to traverse the array.
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
jquery traverses array array
1. for loop:
var arr = new Array(13.5,3,4,5,6); for(var i=0;i<arr.length><p>2. for in loop: </p><pre class='brush:php;toolbar:false;'>var x var mycars = new Array() mycars[0] = "Saab" mycars[1] = "Volvo" mycars[2] = "BMW" for (x in mycars) { document.write(mycars[x] + "<br />") }
3. forEach Method traversal
<script> var arr = [1,3,5,7,9]; var obj = {0:1,1:3,2:5,3:7,4:9}; /** *利用原生JS的forEach方法遍历 *第一个参数:遍历到的元素 *第二个参数:当前遍历到的索引 *注意:原生的forEach方法只能遍历数组,而不能遍历伪数组 */ arr.forEach(function(value,index){ console.log("原生forEach遍历数组:",index,value); }); /** obj.forEach(function(value,index){ console.log("原生forEach遍历伪数组:",index,value); //Uncaught TypeError: obj.forEach is not a function }); */ </script>
4, each() traverses the array
<script> var arr = [1,3,5,7,9]; var obj = {0:1,1:3,2:5,3:7,4:9}; /** * 利用jQuery的each静态方法遍历 * 第一个参数:当前遍历到的索引 * 第二个元素:遍历到的元素 * 注意:jQuery的each方法可以遍历伪数组 */ $.each(arr,function(index,value){ console.log("jQuery-each方法遍历数组:",index,value); }) $.each(obj,function(index,value){ console.log("jQuery-each方法遍历伪数组:",index,value); }) </script>
<script> var arr = [1,3,5,7,9]; var obj = {0:1,1:3,2:5,3:7,4:9}; /** *1.利用原生JS的map方法遍历 *第一个参数:遍历到的元素 *第二个参数:当前遍历到的索引 *第三个参数:当前被遍历的数组 *注意:和原生的forEach方法一样,不能遍历伪数组 */ arr.map(function(value,index,array){ console.log("原生map遍历数组:",index,value,array); }); /** obj.map(function(value,index,array){ console.log("原生map遍历伪数组:",index,value,array); //Uncaught TypeError: obj.forEach is not a function }); */ /** * 2.利用jQuery的each静态方法遍历 * 第一个参数:要遍历的数组 * 每遍历一个元素之后执行的回调函数 * 回调函数的参数: * 第一个参数:遍历到的元素 * 第二个元素:当前遍历到的索引 * 注意:和jQuery的each方法一样可以遍历伪数组 */ $.map(arr,function(value,index){ console.log("jQuery-map方法遍历数组:",index,value); }) $.map(obj,function(value,index){ console.log("jQuery-map方法遍历伪数组:",index,value); }) </script>
The above is the detailed content of Can jquery traverse array array?. For more information, please follow other related articles on the PHP Chinese website!

The advantages of React are its flexibility and efficiency, which are reflected in: 1) Component-based design improves code reusability; 2) Virtual DOM technology optimizes performance, especially when handling large amounts of data updates; 3) The rich ecosystem provides a large number of third-party libraries and tools. By understanding how React works and uses examples, you can master its core concepts and best practices to build an efficient, maintainable user interface.

React is a JavaScript library for building user interfaces, suitable for large and complex applications. 1. The core of React is componentization and virtual DOM, which improves UI rendering performance. 2. Compared with Vue, React is more flexible but has a steep learning curve, which is suitable for large projects. 3. Compared with Angular, React is lighter, dependent on the community ecology, and suitable for projects that require flexibility.

React operates in HTML via virtual DOM. 1) React uses JSX syntax to write HTML-like structures. 2) Virtual DOM management UI update, efficient rendering through Diffing algorithm. 3) Use ReactDOM.render() to render the component to the real DOM. 4) Optimization and best practices include using React.memo and component splitting to improve performance and maintainability.

React is widely used in e-commerce, social media and data visualization. 1) E-commerce platforms use React to build shopping cart components, use useState to manage state, onClick to process events, and map function to render lists. 2) Social media applications interact with the API through useEffect to display dynamic content. 3) Data visualization uses react-chartjs-2 library to render charts, and component design is easy to embed applications.

Best practices for React front-end architecture include: 1. Component design and reuse: design a single responsibility, easy to understand and test components to achieve high reuse. 2. State management: Use useState, useReducer, ContextAPI or Redux/MobX to manage state to avoid excessive complexity. 3. Performance optimization: Optimize performance through React.memo, useCallback, useMemo and other methods to find the balance point. 4. Code organization and modularity: Organize code according to functional modules to improve manageability and maintainability. 5. Testing and Quality Assurance: Testing with Jest and ReactTestingLibrary to ensure the quality and reliability of the code

To integrate React into HTML, follow these steps: 1. Introduce React and ReactDOM in HTML files. 2. Define a React component. 3. Render the component into HTML elements using ReactDOM. Through these steps, static HTML pages can be transformed into dynamic, interactive experiences.

React’s popularity includes its performance optimization, component reuse and a rich ecosystem. 1. Performance optimization achieves efficient updates through virtual DOM and diffing mechanisms. 2. Component Reuse Reduces duplicate code by reusable components. 3. Rich ecosystem and one-way data flow enhance the development experience.

React is the tool of choice for building dynamic and interactive user interfaces. 1) Componentization and JSX make UI splitting and reusing simple. 2) State management is implemented through the useState hook to trigger UI updates. 3) The event processing mechanism responds to user interaction and improves user experience.


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Zend Studio 13.0.1
Powerful PHP integrated development environment

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

Dreamweaver CS6
Visual web development tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

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