When I started to work with Dart and Flutter, few weeks ago, I was looking for something like Erlang finite state machine or Elixir Plug. The first one is most about dealing with state change and events, the second is to easily compose data-structures over functions. In both case, when a developer starts to use one of them, it is impossible to come back, and one will try to reproduce it in any language (in my case, I tried to reimplement them in Perl and Prolog).
What's the plan then? Well, if you are reading my publications, you probably saw few posts on reverse engineering. While I was writing them, I was also looking for functional oriented programming in Dart to make my life easier. I discovered a lot of nice libraries I will show you soon, but, I did not find something close to Erlang/Elixir design patterns. Indeed, it's fascinating how reverse engineering protocols is easy with Erlang and Elixir - mostly due to the syntax - and having a way to manage a state easily could be really helpful.
Erlang Pipeline
Every Unix/Linux user should already know what a pipeline is, the output of a function is the input of the next one. When using Unix/Linux and a shell, input or output are generally strings, but when you switch to another languages, you can have different kind of data-structure. My own definition of pipeline in Erlang is perhaps not the same than other developers, and is coming from the KISS (Keep It Simple Stupid) philosophy from Unix early days. Before showing you an example in Dart, I will show you an Erlang snippet to explain how I see a pipeline. First, let define a module called pipeline which will be used as behavior later.
