Node.jsBuffer.kMaxLength属性

原文:https://www . geesforgeks . org/node-js-buffer-kmaxlength-property/

Buffer.kMaxLength 属性是缓冲模块内类 Buffer 的内置应用编程接口，用于设置和获取单个缓冲实例允许的最大长度。

语法:

const Buffer.kMaxLength


参数:这个属性作为一个 getter 和 setter 工作，所以它有时会将整数值作为一个参数。

返回值:该属性返回单个缓冲实例允许的最大长度。

示例 1: 文件名:index.js

java 描述语言

// Node.js program to demonstrate the
// Buffer.kMaxLength property
// Creating and initializing arraybuffer object
const arrbuff = new ArrayBuffer(16);
// Getting buffer object form existing
// arraybuffer object
const buffer = Buffer.from(arrbuff);
// Setting the the maximum value
// into the buffer
buffer.kMaxLength = 23;
// Getting the maximum length by using
// kMaxLength property
const value = buffer.kMaxLength;
// Display the result
console.log("kMaxLength is: " + value);


输出:

kMaxLength is: 23


示例 2: 文件名:index.js

如果 kMaxLength 未初始化

Javascript

// Node.js program to demonstrate the
// Buffer.kMaxLength property
// If kMaxLengthis is not initialized
// Creating and initializing arraybuffer
// object
const arrbuff = new ArrayBuffer(16);
// Getting buffer object form existing
// arraybuffer object
const buffer = Buffer.from(arrbuff);
// Getting the maximum length by using
// kMaxLength property
const value = buffer.kMaxLength;
// Display the result
console.log("kMaxLength is: " + value);


输出:

kMaxLength is: undefined


使用以下命令运行 index.js 文件:

node index.js


参考:https://nodejs . org/dist/latest-v 12 . x/docs/API/buffer . html # buffer _ buffer _ kmaxlength