UPDATE : After the Google IO’13 started, the experiment has been moved to a new home : https://developers.google.com/events/io/experiment

If you just want the GoogleIO’13 easter eggs codes, jump directly to the bottom if this post. If you’re interested in how I got’em all, read along.

So, the main codebase is located in the /js/app.min.js of the site. But it’s compiled and pretty much unreadable. Luckily, I have Sight, a Chrome extension that indents/prettifies the code. But still, it’s still not readable.

I had to browse through the code to find some telltale signs, and what do you know, I find this :

ww.mode.register("home", ww.mode.HomeMode, null);
ww.mode.register("cat", ww.mode.CatMode, 231, 8);
var isAndroid = navigator.userAgent.match(/Android/);
isAndroid || ww.mode.register("space", ww.mode.SpaceMode, 42, 8);
ww.mode.register("pong", ww.mode.PongMode, 129, 8);
ww.mode.register("bacon", ww.mode.BaconMode, 144, 8);
ww.mode.register("simone", ww.mode.SimoneMode, 211, 8);
ww.mode.register("eightbit", ww.mode.EightBitMode, 83, 8);
ww.util.getAudioContextConstructor() && (ww.mode.register("song", ww.mode.SongMode, 219, 8), ww.mode.register("synth", ww.mode.SynthMode, 136, 8));
ww.mode.register("ascii", ww.mode.AsciiMode, 127, 8);
ww.mode.register("bowling", ww.mode.BowlingMode, 117, 8);
ww.mode.register("rocket", ww.mode.RocketMode, 69, 8);
ww.mode.register("burger", ww.mode.BurgerMode, 57, 8);

It doesn’t say much, but at least there is some chance I could decipher this mess.

Then I searched for the ww.mode.register function,  which is :

ww.mode.register = function(a, b, c, d) {
  ww.mode.modes[a] = {
    klass: b,
    pattern: c,
    len: d
  }
};

Klass, Pattern, and len. I looked for where is klass (easier and distinguishable) is called/located through the code, and I found this snippet, which unlocks pretty much everything :

for (c in a) a.hasOwnProperty(c) && a[c].pattern && (d = a[c], b[c] = {
  klass: d.klass,
  binaryPattern: ww.util.pad(d.pattern.toString(2), d.len)
});

Three things : ww.util.pad, d.pattern, and d.len.

ww.util.pad pretty much does an d.len-bit binary conversion  (code below), in our case, always 8bit, and d.pattern is the c param in the ww.mode.register function,

ww.util.pad = function(a, b) {
  for (var c = "" + a; c.length < b;) c = "0" + c;
  return c
};

Now everything is crystal clear – All I had to do is to rewrite the ww.util.pad as a standalone function :

function io(a, b) {
  for (var c = "" + a; c.length < b;) c = "0" + c;
  return c;
}

And then, it’s just a matter of calling io() with the different patterns converted to binary:

var a = 219;
io(a.toString(2), 8); //outputs 11011011, which converts to IIOIIOII

List of all the GoogleIO’13 easter eggs and codes

Go to GoogleIO’13 site, and enter one of the following codes :

• Cat : IIIOOIII
• Space: OOIOIOIO
• Pong : IOOOOOOI
• Bacon : IOOIOOOO
• Simone : IIOIOOII
• Eightbit : OIOIOOII
• Synth : IOOOIOOO
• Song : IIOIIOII
• ASCII : OIIIIIII
• Bowling : OIIIOIOI
• Rocket : OIOOOIOI
• Burger : OOIIIOOI