I was working on a microservice API that is used as mock integration for a third party API. We asked the vendor to make one for us but it’s not a priority on their roadmap so I built one for us. This API is used every day for testing and rarely has issues.

We’re going to talk about a little bit of math and why it’s important for designing and debugging code. y = f(x) is commonly referred to as a “functional notation”. It is a mathematical equation that represents a relationship between two variables, x and y.