node . js buffer . readfloatibe()方法
原文:https://www . geesforgeks . org/node-js-buffer-readfloatibe-method/
Buffer.readFloatBE()方法是 Buffer 模块中类 Buffer 的内置应用编程接口，用于将大端 32 位浮点值读取到指定偏移量处的已分配缓冲区。
语法:
Buffer.readFloatBE( offset )
参数:该方法接受单参数偏移量，指定读取前要跳过的字节数。偏移值为 0 < =偏移< =“缓冲长度”–4<强>。它的默认值是 0。
*返回值:*以大端格式返回整数值。
**以下示例说明了 Node.js 中 buf.readFloatBE()方法的使用:
示例 1:
// Node program to demonstrate the
// Buffer.readFloatBE(INTEGER) method
// Creating a buffer of given size
const buf = Buffer.from([10, 20, 30, 40, 50, 60, 70, 80]);
// Display the result
console.log("Functions of Buffer.readFloatBE(int)");
console.log(buf.readFloatBE(0))
console.log(buf);
```**
**输出:**
```js
Functions of Buffer.readFloatBE(int)
7.13161255447549e-33
<Buffer 0a 14 1e 28 32 3c 46 50>
例 2:
// Node program to demonstrate the
// Buffer.readFloatBE(INTEGER) method
// Creating a buffer of given size
const buf = Buffer.from([100, 200, 300, 400, 500, 600, 700, 800]);
// Display the result
console.log("Functions of Buffer.readFloatBE(int)");
console.log(buf.readFloatBE(5))
console.log(buf);
输出:
Functions of Buffer.readFloatBE(int)
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 <= 5 4\. received . .< pre>**注意:**以上程序使用`node index.js`命令编译运行。**参考:**T2】https://nodejs . org/docs/latest-v 11 . x/API/buffer . html # buffer _ buf _ readfloatibe _ offset=>
=>
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