Recently my company deployed some application changes that exposed a flaw in a long-running part of the application that seemingly should not have been impacted by the changes that were made. Our application facilitates digital private placements and part of that process includes allowing investors to download a series of documents. Those documents weren't showing up in the UI though they were present in the database and in the response from the API. The problem was clearly in the JavaScript portion of our application and the entire team was anxious to get this fixed. After many hours of debugging and looking at data we finally discovered that a computation was being seen as both truthy and falsey at the same time.

Recently I have had the opportunity to get back into developing with PHP 7, which means I've been getting my hands dirty with amphp. If you are unfamiliar with the project you should definitely check it out. It provides a series of libraries that makes asynchronous programming in PHP easy and accessible.