JavaScript中的charCodeAt方法怎么用
JavaScript中的charCodeAt方法的用法:该方法用于返回指定位置的字符的Unicode编码。语法是【string.charCodeAt(index)】,参数index表示字符串中某个位置的数字,即字符在字符串中的下标。
JavaScript charCodeAt方法怎么用?
JavaScript charCodeAt() 方法
定义和用法
charCodeAt() 方法可返回指定位置的字符的 Unicode 编码。
字符串中第一个字符的位置为 0, 第二个字符位置为 1,以此类推。
语法
string.charCodeAt(index)
参数值
参数
index 必需。表示字符串中某个位置的数字,即字符在字符串中的下标。
返回值
Number 返回在指定的位置的字符的 Unicode 编码。
实例
返回字符串中最后一个字符的 Unicode 编码:
var str = "HELLO WORLD"; var n = str.charCodeAt(str.length-1);
n 输出结果:
68
推荐教程:《javascript基础入门》

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

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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

To work on file upload we are going to use the form helper. Here, is an example for file upload.

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

Validator can be created by adding the following two lines in the controller.

Logging in CakePHP is a very easy task. You just have to use one function. You can log errors, exceptions, user activities, action taken by users, for any background process like cronjob. Logging data in CakePHP is easy. The log() function is provide

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.
