OmbuLabs Blog

Frontend development is so exciting nowadays! There is a wide spectrum of opportunities in each particular project. There can be tons of different interesting cases related to feature development, bug fixing and testing! A lot of new components, configurations, and flows.

It’s been a few months now that we’ve been toying with Elixir here at OmbuLabs. Particularly with Phoenix. However, I like to toy a bit with the language without the added complexity of a framework on it, in order to better understand it, how it works and how things are done.

It took me a while, but as I read through “Programming Phoenix”, I had the idea to implement a “simple” calculator program in Elixir. The reasons were quite simple:

• I wanted to better grasp unit testing with ExUnit, and a calculator has very clear specifications, making it the ideal candidate.
• I also wanted to put a little twist to things and while math has very clear specs, it can have some very complex operations, so I decided to make my calculator do derivations.

For those of you that aren’t versed in calculus, don’t worry, I’ll give just what you need to know in order to understand what I’m doing, but trust me, you won’t need to really understand calculus to understand the code.