understanding the readable stream

gistfile1.txt

var Readable;
Readable = require("stream").Readable;

var readable;
readable = new Readable();

var i;
i = 0;

readable._read = function(){
    if(++i > 10){
        return readable.push(null);//push null end the stream?
    }
    setTimeout(function(){
        readable.push(i + "\n");
    }, 1000);
};
//inner mechanism invoke the function untill... a centrain false value is pass through 
readable.pipe(process.stdout);

//few questions:
/*\
|*| 1. does stream inherit from Array?
|*| 2. ... pretty much it for now...
|*| 3. <-- I like the comment style on the side so I'mma fill it out
|*| 4. one more to go.
|*| 5. done.
\*/

1. No.

okay thanks...