Buffer.concat()

Buffer.concat(list[, totalLength])

• list {Array} 需要连接的 Buffer 对象数组


• totalLength {Number} 上述需要被连接的 Buffer 的总大小。


• 返回：{Buffer}

const buf1 = Buffer.alloc(10, 0);
const buf2 = Buffer.alloc(14, 0);
const buf3 = Buffer.alloc(18, 0);
const totalLength = buf1.length + buf2.length + buf3.length;

console.log(totalLength);
const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
console.log(bufA);
console.log(bufA.length);

// 42
// <Buffer 00 00 00 00 ... >
// 42

Buffer.concat()

原文：https://www.cnblogs.com/lalalagq/p/9908505.html