YashdalfTheGray

Gravity Points

http://jsdo.it/akm2/5SPA

Forked from AKM2's Pen Gravity Points.

A Pen by Yash on CodePen.

License.

YashdalfTheGray

Mac OS X 10.10 Yosemite

Custom recipe to get OS X 10.10 Yosemite running from scratch, setup applications and developer environment. I use this gist to keep track of the important software and steps required to have a functioning system after a semi-annual fresh install. On average, I reinstall each computer from scratch every 6 months, and I do not perform upgrades between distros.

This keeps the system performing at top speeds, clean of trojans, spyware, and ensures that I maintain good organizational practices for my content and backups. I highly recommend this.

You are encouraged to fork this and modify it to your heart's content to match your own needs.

Install Software

YashdalfTheGray

var promise = $timeout(messageFunction, delay);
promise.then(function(result) {
    ctrl.message = result;
});

// The call to then() can also be chained.
$timeout(messageFunction, delay).then(function(result) {
    ctrl.message = result;
});

YashdalfTheGray

server.getData(url)
.then(function(result) {
    // this code block runs when the
    // promise gets fulfilled.
    
    ctrl.myData = result;
})
.catch(function(error) {
    // this code block runs when there
    // is an error encountered or if the

YashdalfTheGray

server.getUsername()
.then(function(result) {
    return server.getProfile(result);
}).then(function(result) {
    displayProfile(result);
    return server.getProfilePicture(result.imageUrl);
}).then(function(result) {
    udpateProfilePicture(result);
    console.log('Data loaded');
}).catch(function(error) {

YashdalfTheGray

function getFile(url) {
    // create a deferred object.
    var def = $q.defer();
    
    // NOTE 
    // the $http methods success() and error()
    // have been deprecated in favor of using then()
    // from the standard Promises API. These are
    // used here to show how to create a promise.
    $http.get(url)

YashdalfTheGray

// assume that getUsers returns a promise but
// the service may not be written in angular
$q.when(service.getUsers()).then(function(result) {
    ctrl.userList = result;
});

// $q.when() can also be useful when writing stubs
function getUsers() {
    // this function is supposed to return a promise
    // but in test, it doesn't make sense to do that

YashdalfTheGray

$q.all([
    server.getFollowersList(),
    server.getFollowingList(),
    server.getTweets(),
    server.getUserDescription()
]).then(function(result) {
    // The result object will be an array
    // with all of the results.
    ctrl.updateFollowers(result[0]);
    ctrl.updateFollowing(result[1]);

YashdalfTheGray

function getResource(url) {
    var resource = [];
    var def = $q.defer();
    var lastProgress = 0;
    server.openAndGet(url, function(chunk) {
        resource.push(chunk);
    });
    while(!server.txDone()) {
        if (server.getProgress() !== lastProgress) {
            lastProgress = server.getProgress();

YashdalfTheGray

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.