Beep function that returns a promise when its done, for Node.js.

beep.js

// problem: beeper uses setTimeouts() for multiple beeps yet has no callback
// solution: return a promise for when beeping is done

var beeper = require('beeper'),
    _ = require('lodash'),
    q = require('q')
;

function beep(count) {
    return q.all(_.times(typeof count === 'undefined' ? 1 : count, function (n) {
        return q.delay(undefined, n * 500).then(beeper);
    }));
}

beep().then(process.exit);