watson

var foo = require('foo');

var next = foo(function (err, results) {
  err     // => the first error thrown
  results // => array of all the results
});

doSomething(next());
doSomethingElse(next());
anotherThing(next());

watson

// This will stop working after a few iterations on Node 0.10.30
// For details see: https://github.com/joyent/node/issues/8065

setInterval(function () {
  console.log("I'm alive!");
}, 42.1);

watson

var http = require('http');

http.createServer(function (req, res) {
  console.log('Got request');
  req.pause();

  var size = 0;
  req.on('data', function (chunk) {
    console.log('Counting...');
    size += chunk.length;

watson

var stream = require('stream')

var rs = new stream.Readable()

rs.push('hello')
rs.push('world')
rs._read = function() {}

var sameTick = true
rs.on('data', function() {

watson

This sets up two HTTP servers on port 3000 and 3001. The one on port 3000 works as expected, the one on port 3001 doesn't.

Console log output when requesting server on port 3000:

------- NEW WORKING REQUEST -------
New listener added: end
adding 1st data litener
New listener added: data
New listener added: data
New listener added: readable

watson

var process = function (a, b) {
  // do some async stuff with a and b
};

process(foo1, bar1);
process(foo2, bar2);

watson

var http2 = require('http2'); // working title

http2.get('http://foo.com').pipe(...);
http2('http://foo.com').pipe(...);

http2('https://example.com')
  .on('response', function (res) {
    // e.g. allows you to inspect the headers and take appropriate action
    if (res.headers['some-header'] === 'some-value')
      this.abort();

watson

watson% traceroute cloudflare.com
traceroute: Warning: cloudflare.com has multiple addresses; using 190.93.240.253
traceroute to cloudflare.com (190.93.240.253), 64 hops max, 52 byte packets
 1  192.168.1.1 (192.168.1.1)  1.437 ms  0.888 ms  1.319 ms
 2  10.66.128.210 (10.66.128.210)  61.005 ms  31.291 ms  33.169 ms
 3  10.66.128.209 (10.66.128.209)  31.651 ms  35.649 ms  39.613 ms
 4  172.18.4.101 (172.18.4.101)  51.770 ms
    172.18.4.85 (172.18.4.85)  31.144 ms
    172.18.4.81 (172.18.4.81)  31.394 ms
 5  172.18.72.66 (172.18.72.66)  31.356 ms

watson

watson% traceroute google.com
traceroute: Warning: google.com has multiple addresses; using 173.194.70.139
traceroute to google.com (173.194.70.139), 64 hops max, 52 byte packets
 1  192.168.33.1 (192.168.33.1)  1.203 ms  1.333 ms  0.859 ms
 2  * * *
 3  * * *
 4  * * *
 5  192.168.14.106 (192.168.14.106)  3277.827 ms  2498.515 ms  1261.000 ms
 6  192.168.14.102 (192.168.14.102)  833.789 ms  1879.912 ms  3759.086 ms
 7  2.239.214.82.in-addr.arpa (82.214.239.2)  2454.781 ms  1959.662 ms  1167.737 ms

watson

var dbUri = '...';
var db = require('mongojs').connect(dbUri, ['testing']); 

var data = { foo: 1 };
for (var n = 0; n < 10; n++) {
  db.testing.insert(data, function (err, res) {
    if (err) console.log(err.message);
  });
}