Nicolas Perriault

You should avoid waiting for an arbitrary amount of milliseconds for processing a next step, rather use waitFor* methods as they're more deterministic :)

Thanks!

@dperrymorrow thanks!

PS: you've fixed it as "CapserJS" ;)

s/CaserJS/CasperJS :)

You're welcome :) Now I'm looking back at the resulting code, I wonder if using map() wouldn't be even more concise:

function get_all_the_things(things) {
    return Q.all(things.map(function(thing) {
        var deferred = Q.defer();
        get_a_thing(thing, function(result) {
            deferred.resolve(result);
        });
        return deferred.promise;
    }));
}

Very nice post. As a side note, instead of writing loops like:

for (var i = 0; i < async_operations.length; i++) {
    (function(i) {
        //...
    })(i);
});

You should consider using forEach instead:

async_operations.forEach(function(op) {
     //...
});