Created by Christopher Manning
Nodes are linked to nodes in neighboring cells. The cell's color is a function of its area.
The white lines are the Delaunay triangulation and the purple cells are the Voronoi diagram.
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gource commands | |
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# basic command for big and long projects | |
gource --max-user-speed 500 --seconds-per-day 0.05 --file-idle-time 10 -e 0.005 -f --max-files 300 --hide-files | |
# some easy to understand commands | |
# for output file | |
--output-ppm-stream ~/ppm/ppm-kohana |
Created by Christopher Manning
Nodes are linked to nodes in neighboring cells. The cell's color is a function of its area.
The white lines are the Delaunay triangulation and the purple cells are the Voronoi diagram.
function go() { | |
var userId = prompt('Username?', 'Guest'); | |
checkIfUserExists(userId); | |
} | |
var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users'; | |
function userExistsCallback(userId, exists) { | |
if (exists) { | |
alert('user ' + userId + ' exists!'); |
function go() { | |
var userId = prompt('Username?', 'Guest'); | |
var userData = { name: userId }; | |
tryCreateUser(userId, userData); | |
} | |
var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users'; | |
function userCreated(userId, success) { | |
if (!success) { |
function go() { | |
var userId = prompt('Username?', 'Guest'); | |
// Consider adding '/<unique id>' if you have multiple games. | |
var gameRef = new Firebase(GAME_LOCATION); | |
assignPlayerNumberAndPlayGame(userId, gameRef); | |
}; | |
// The maximum number of players. If there are already | |
// NUM_PLAYERS assigned, users won't be able to join the game. | |
var NUM_PLAYERS = 4; |
function makeList(ref) { | |
var fruits = ["banana", "apple", "grape", "orange"]; | |
for (var i = 0; i < fruits.length; i++) { | |
ref.push(fruits[i]); | |
} | |
} | |
function getFirstFromList(ref, cb) { | |
ref.startAt().limit(1).once("child_added", function(snapshot) { | |
cb(snapshot.val()); |
One of the best ways to reduce complexity (read: stress) in web development is to minimize the differences between your development and production environments. After being frustrated by attempts to unify the approach to SSL on my local machine and in production, I searched for a workflow that would make the protocol invisible to me between all environments.
Most workflows make the following compromises:
Use HTTPS in production but HTTP locally. This is annoying because it makes the environments inconsistent, and the protocol choices leak up into the stack. For example, your web application needs to understand the underlying protocol when using the secure
flag for cookies. If you don't get this right, your HTTP development server won't be able to read the cookies it writes, or worse, your HTTPS production server could pass sensitive cookies over an insecure connection.
Use production SSL certificates locally. This is annoying
// assumes you add a timestamp field to each record (see Firebase.ServerValue.TIMESTAMP) | |
// pros: fast and done server-side (less bandwidth, faster response), simple | |
// cons: a few bytes on each record for the timestamp | |
var ref = new Firebase(...); | |
ref.orderByChild('timestamp').startAt(Date.now()).on('child_added', function(snapshot) { | |
console.log('new record', snap.key()); | |
}); |
/*************************************************** | |
* Simple and elegant, no code complexity | |
* Disadvantages: Requires warming all data into server memory (could take a long time for MBs of data or millions of records) | |
* (This disadvantage should go away as we add optimizations to the core product) | |
***************************************************/ | |
var fb = firebase.database.ref(); | |
/** | |
* @param {string} emailAddress |