Node.js中的Buffer.readDoubleBE()方法用於以Big Endian格式從給定偏移量的緩衝區中讀取64位double。
用法:
Buffer.readDoubleBE( offset )
參數:此方法接受單個參數偏移量,該偏移量包含開始讀取之前要跳過的字節數。 offset的值介於0之間
返回值:它以big endian格式返回整數值。
以下示例說明了在Node.js中使用buf.readDoubleBE()方法:
範例1:
// Node program to demonstrate the
// Buffer.readDoubleBE() 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.readDoubleBe(int)");
console.log(buf.readDoubleBE(0))
console.log(buf);
輸出:
Functions of Buffer.readDoubleBe(int) 4.0888790063059496e-260 <Buffer 0a 14 1e 28 32 3c 46 50>
範例2:
// Node program to demonstrate the
// Buffer.readDoubleBE() 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.readDoubleBe(int)");
console.log(buf.readDoubleBE(5))
console.log(buf);
輸出:
Functions of Buffer.readDoubleBe(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 andNote: The above program will compile and run by using the
node index.js
command.Reference: https://nodejs.org/docs/latest-v11.x/api/buffer.html#buffer_buf_readdoublebe_offset
相關用法
注:本文由純淨天空篩選整理自MerlynShelley大神的英文原創作品 Node.js | Buffer.readDoubleBE() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。