var buf1 = new Buffer('Rahul');  Buffer contains Rahul
var buf2 = new Buffer('Kumar');  Buffer contains Kumar
var buf3 = new Buffer('Rahul');  Buffer contains Rahul

r1= buf1.compare(buf2);
r2= buf1.compare(buf3);
r3= buf2.compare(buf3);

console.log(r1+ " " + r2 + " " + r3);