On object looping: Object.keys(obj).forEach(function (key) { var value = obj[key]; // ... }); Not the best thing, but it works in less

On object looping: Object.keys(obj).forEach(function (key) { var value = obj[key]; // ... }); Not the best thing, but it works in less lines than: var key; for (key in obj) { if (!Object.prototype.hasOwnProperty(obj, key) { continue; } var value = obj[key]; // ... } Plus, it avoids the async-function-in-a-loop problem (which is why I rarely use C-style `for` loops or `for-in` loops now).