Node buffer模块缓冲区

//1:字节 byte

//1024b = 1kb [千字节]

//1024kb = 1mb [兆字节]

//1024mb = 1gb [吉字节]

//1024gb = 1tb [梯]

//1024tb = 1pb

//1:创建大小为1024字节缓冲区

var buf1 = Buffer.alloc(1024);

console.log(buf1);

console.log(buf1.length);

//2:创建3KB大小缓冲区

var buf2 = Buffer.alloc(1024*3);

console.log(buf2);

//3:创建一个数组初始化缓冲区

var buf3 = Buffer.from([1,2,3,4,5]);

console.log(buf3);

//4:创建一个字符串缓冲区

var buf4 = Buffer.from("一二三");

console.log(buf4);

console.log(buf4.toString());