Class: Task

var task = new Task('greet', () => { console.log('Hello!') });
task(); // "Hello!"

var task = new Task('notify', resolve => {
  setTimeout(() => {
    console.warn('Hey!');
    resolve('task done.');
  }, 3000);
});

task() // runs asnychronously, and returns a promise
.then(resol => { // runs after 3 seconds
  console.log(resol); // "task done."
});

var taskA = new Task('A', resolve => {
  setTimeout(() => { console.log('task A done.'); resolve() }, 3000);
});
var taskB = new Task('B', resolve => {
  setTimeout(() => { console.log('task B done.'); resolve() }, 6000);
});
var taskC = new Task('C', () => {
  console.log('task C done.');
}, [taskA, taskB]); // dependencies

taskC(); // outputs:
// "task A done."
// "task B done."
// "task C done."

// NOTE: taskA and taskB run in parallel

new Task('task B', [taskA]);      // name and dependencies (no job)
new Task(() => { ... }, [taskA]); // job and dependencies (no name)
new Task(() => { ... });          // only job (no name, no dependencies)
new Task([taskA]);                // only dependencies (no name, no job)

var taskA = new Task('task A', () => { ... });
var taskB = new Task('task B', () => { ... });
var taskC = new Task('task C', () => { ... });
taskC.depend(taskA, taskB);       // add taskA and taskB as dependencies
taskC();

var task = new Task((resolve, reject) => {
  throw 'I AM ERROR';
  // or
  reject('I AM ERROR');
});
task().catch(e => {
  // NOTE: e is a TaskJobFailure instance
  console.error(e.info.thrown); // 'I AM ERROR'
});