Node.js Buffer.writeUInt16LE()方法
原文:https://www . geesforgeks . org/node-js-buffer-writeuint 16le-method/
Buffer.writeUInt16LE()方法用于将小端格式的指定字节写入缓冲对象。这里，值应该是有效的无符号 16 位整数。
语法:
Buffer.writeUInt16LE( 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 and will be written into the buffer.
- Offset is an integer value, which indicates the number of bytes to skip before writing. The value of offset is in the range of 0 to buffer.length–2 , and the default value is 0.
返回值:返回一个整数值偏移量加上写入的字节数。
例 1:
// Node.js program to demonstrate the
//Buffer.writeUInt16LE() Method
const buff = Buffer.allocUnsafe(4);
buff.writeUInt16LE(0xdead, 0);
console.log(buff);
buff.writeUInt16LE(0xbeef, 2)
console.log(buff);
输出:
<Buffer ad de 00 00>
<Buffer ad de ef be>
例 2:
// Node.js program to demonstrate the
//Buffer.writeUInt16LE() Method
const buff = Buffer.allocUnsafe(4);
buff.writeUInt16LE(0xfeed, 0);
console.log(buff);
buff.writeUInt16LE(0xabcd, 2);
console.log(buff);
输出:
<Buffer ed fe 00 00>
<Buffer ed fe cd ab>
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 _ writeuint16le _ value _ offset
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