Node.js Buffer.writeUInt16BE()方法
原文:https://www . geesforgeks . org/node-js-buffer-writeuint 16 be-method/
Buffer.writeUInt16BE()方法用于使用大端格式将指定的字节写入缓冲对象。该值应为有效的无符号 16 位整数。
语法:
Buffer.writeUInt16BE( value, offset )
参数:该方法接受两个参数，如上所述，如下所述:
- Value: It is an integer value to be written into the buffer.
- Offset: is an integer value, indicating the number of bytes to skip before writing, and the offset value is in the range of 0 to buffer.length–2 . Its default value is 0.
返回值:返回偏移量加上写入字节数的整数值。
例 1:
// Node.js program to demonstrate the
// Buffer.writeUInt16BE() Method
// Allocate a buffer
const buf = Buffer.allocUnsafe(4);
// Write the buffer element in BE format
buf.writeUInt16BE(0xabcd, 0);
// Display the buffer list
console.log(buf);
// Write the buffer element in BE format
buf.writeUInt16BE(0xfede, 2)
// Display the buffer list
console.log(buf);
输出:
<Buffer ab cd f4 09>
<Buffer ab cd fe de>
例 2:
// Node.js program to demonstrate the
// Buffer.writeUInt16BE() Method
// Allocate a buffer
const buf = Buffer.allocUnsafe(4);
// Write the buffer element in BE format
buf.writeUInt16BE(0xabab, 0);
// Display the buffer list
console.log(buf);
// Write the buffer element in BE format
buf.writeUInt16BE(0xefde, 2);
// Display the buffer list
console.log(buf);
输出:
<Buffer ab ab ad 09>
<Buffer ab ab ef de>
注意:以上程序使用node index.js命令编译运行。
参考:https://nodejs . org/API/buffer . html # buff _ writeuint 16 be _ value _ offset
版权属于：月萌API www.moonapi.com，转载请注明出处
