buf.writeDoubleBE(value[, offset])

• value <number> 要写入 buf 的数字。

  \value <number> Number to be written to buf.

• offset <integer> 开始写入之前要跳过的字节数。必须满足 0 <= offset <= buf.length - 8。默认值:0。

  \offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 8. Default: 0.

• 返回:<integer> offset 加上写入的字节数。

  \Returns: <integer> offset plus the number of bytes written.

将 value 作为大端序写入 buf 中指定的 offset。value 必须是 JavaScript 数字当 value 不是 JavaScript 数字时,则行为未定义。

\Writes value to buf at the specified offset as big-endian. The value must be a JavaScript number. Behavior is undefined when value is anything other than a JavaScript number.

import { Buffer } from 'node:buffer';
const buf = Buffer.allocUnsafe(8);
buf.writeDoubleBE(123.456, 0);
console.log(buf);
// Prints: <Buffer 40 5e dd 2f 1a 9f be 77>const { Buffer } = require('node:buffer');
const buf = Buffer.allocUnsafe(8);
buf.writeDoubleBE(123.456, 0);
console.log(buf);
// Prints: <Buffer 40 5e dd 2f 1a 9f be 77>拷贝