// 0으로 초기화됨.
const buffer = Buffer.alloc(1024);

//or 초기화 없음
// buffer = Buffer.allocUnsafe(1024);
buffer.write('Hi.');
console.log(buffer.toString());

const buff = Buffer.from('Hello');
console.log(buff[0]);
console.log(buff.length);
console.log(buff.toString());
for (const c of buff) {
    console.log(c);
}


// copy
let buf2 = Buffer.alloc(2);
buffer.copy(buf2, 0, 0, 2);

// slice
console.log(buffer.slice(0, 2).toString());