Node.js Buffer.length 属性

Buffer.length属性是缓冲区模块中Buffer类的内置应用程序编程接口，用于获取此缓冲区对象的长度。

句法：

const Buffer.length

参数：此属性不接受任何参数。

返回值：此属性返回此缓冲区对象的长度。

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// Buffer.length property
  
// Creating and initializing arraybuffer object
const arrbuff = new ArrayBuffer(16);
  
// Getting buffer object form existing
// arraybuffer object
const buffer = Buffer.from(arrbuff);
  
// Getting byteoffset of buffer
// by using byoffset api
const length = buffer.length;
  
// Display the result
console.log("Length is : " + length);

输出：

Length is : 16

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// Buffer.length property
  
// Creating and initializing arraybuffer object
const arrbuff = new ArrayBuffer(16);
  
// Getting buffer object form existing
// arraybuffer object
const buffer = Buffer.from(arrbuff);
  
// Getting byteoffset of buffer
// by using byoffset api
const length = buffer.length;
  
// Creating and initializing Int8Array object
const buff = new Int8Array(buffer, buffer.byteoffset, length);
  
// Display the result
console.log("Int8Arry object :- " + buff);

输出：

Int8Arry object :- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

使用以下命令运行 index.js 文件：

node index.js

参考： https://nodejs.org/dist/latest-v12.x/docs/api/buffer.html#buffer_buf_length