Encounter problems when running Quickstart and A simple K/V store about cruise

[tailiu]

In addition, In the A simple K/V store example, I simply copy the upper code into a file called db.js and the lower code into a file called cruise.js. Then I run cruise.js. I encounter the following problem:

db.js:18
cruise.on('data', function(data){
^
ReferenceError: cruise is not defined

So I add 'this' before 'cruise.on' and it becomes: this.cruise.on('data', function(data)...... I run cruise.js again. This time I encounter another problem:

db.js:30
this.cruise.peer(addr);
^
TypeError: undefined is not a function

I am a little confused and do I also need to further change some code to make it run successfully on my machine? Thanks