TS里Buffer.from(str)

这是一个IT类问题。在 TypeScript 中，Buffer.from(str) 方法用于创建一个新的 Buffer 实例，其中包含给定的字符串 str 的二进制数据。该方法的返回值类型为 Buffer。需要注意的是，Buffer 是 Node.js 中用于处理二进制数据的类。因此，该方法只能在 Node.js 中使用，在浏览器端不可用。

相关问题

如何在浏览器端TS代码里实现buffer.from(str)

在浏览器端的 TypeScript 代码中，可以使用 `TextEncoder` 和 `TextDecoder` 对象来实现将字符串转换为 `Uint8Array` 类型的 `Buffer`。

具体的实现代码如下：

const encoder = new TextEncoder();
const decoder = new TextDecoder();

const str = "Hello, world!"; // 待转换的字符串
const buffer = encoder.encode(str); // 将字符串转换为 Uint8Array 类型的 Buffer
const str2 = decoder.decode(buffer); // 将 Buffer 转换为字符串

在上述代码中，`TextEncoder` 对象的 `encode` 方法可以将字符串转换为 `Uint8Array` 类型的 Buffer，而 `TextDecoder` 对象的 `decode` 方法可以将 Buffer 转换为字符串。

TS 里引入fast-buffer.ts库 再详细讲解如何使用

To use the fast-buffer.ts library in a TypeScript project, you can follow these steps:

1. Install the fast-buffer.ts library as a dependency in your project using npm or yarn. You can do this by running the following command in your project directory:

npm install fast-buffer.ts

or

yarn add fast-buffer.ts

2. Import the FastBuffer class from the fast-buffer.ts library in your TypeScript file:

import { FastBuffer } from 'fast-buffer.ts';

3. Create a new instance of the FastBuffer class by passing the desired buffer size (in bytes) as an argument:

const buffer = new FastBuffer(1024); // create a 1KB buffer

4. You can now use the buffer instance to read from or write to the buffer, using the methods provided by the FastBuffer class. For example:

// write a string to the buffer
buffer.write('hello world');

// read the string from the buffer
const str = buffer.toString();
console.log(str); // prints "hello world"

The FastBuffer class provides a similar API to the built-in Buffer class, but with improved performance. It is recommended to use FastBuffer when you need to work with large buffers or perform many read/write operations on a buffer.