Node.js Buffer.readInt16BE()方法
原文:https://www . geesforgeks . org/node-js-buffer-readint 16 be-method/
Buffer.readInt16BE()方法是一个内置的类 Buffer 的应用编程接口，带有 in Buffer 模块，以大端格式从指定偏移量的缓冲区中读取一个 16 位有符号整数。
语法:
Buffer.readInt16BE( offset )
参数:该方法接受单个参数偏移量，指定开始写入前要跳过的字节数(整数)。偏移值在范围 0 < =偏移<= buf . length–2内。它的默认值为零。
返回值:返回偏移量和写入的字节数。
例 1:
// Node.js program to demonstrate the
// Buffer.readInt16BE() method
// Create a buffer
const buf = Buffer.from([0, 3]);
// Display the result
console.log(buf.readInt16BE(0));
输出:
3
例 2:
// Node.js program to demonstrate the
// Buffer.readInt16BE() method
// Create a buffer
const buf = Buffer.from([0, 3]);
// Display the result
console.log(buf.readInt16BE(1));
输出:
internal/buffer.js:72
throw new ERR_OUT_OF_RANGE(type || 'offset',
^
RangeError [ERR_OUT_OF_RANGE]: The value of "offset" is out of range.
It must be >= 0 and <= 1 0\. received . .< pre>**参考:**[https://nodejs . org/API/buffer . html # buffer _ buf _ readint 16 be _ offset](https://nodejs.org/api/buffer.html#buffer_buf_readint16be_offset)=>
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