Explore creating robust HTTP services in Scala's functional programming paradigm. Gain insights into pure vs. impure implementations, their pros and cons, and effective tool usage.

scala-platform.tar.gz

Scala-Pure

Scala-Impure

Scala-Tapir

Scala-Impure-Test

Scala-Pure-Test

Scala-Tapir-Test

Test

Scala - Run Code Widget 

Scala-Pure-copy

Scala is one of the most popular general-purpose languages that supports both object-oriented and functional programming. In this course, you will learn how to create back-end HTTP services using Scala's functional programming paradigm.

You will also learn how to develop, test, and document the service using both pure and impure ways. You will be exposed to the differences between pure and impure implementation, their respective pros and cons, and how pure implementation can be more robust in terms of performance, understandability, testability, and type safeness. 

By the end of the course, you will have a clear idea of how functional programming works in Scala and how you can use the available tools more effectively.

Pure Functional HTTP APIs in Scala

Let's start by looking into what we have learned so far.
# Lessons learned

Thank you for taking this course. We hope that you had fun reading it, have learned something, and have gotten some ideas about what is possible in the realm of programming.

The next time someone claims that “academic functional nonsense” is for naught, please remember some of the things you learned in this course. Pure functional programming can help us significantly in our daily work.

1. Better understandable code
2. Better testable code
3. Better performing code
4. Better type safety using refined types
5. Deriving boilerplate code from our statically typed models and logic
6. Easier working with deeply nested structures using optics

There is no need to stick to impure and messy stuff that is hard to maintain. But also remember that functional programming is not done for its own sake; it is another way to deliver value. In our field of work, this value usually translates to some working software/program/application.

# Next steps 
If you are searching for something to dive into next or are wondering which other web development technologies you can learn, the [Modern Front-end Development for Rails
](https://www.educative.io/courses/modern-front-end-rails) course is an excellent place to start.

You can explore also other courses on [educative.io](https://www.educative.io/).

So people of the baud and the electron, venture forth, cross boundaries, use the knowledge available out there and have fun!

# Final thoughts
We hope that this course was a good learning experience for you.

Your feedback, comments, concerns, and questions are always welcome.  Feel free to drop us an email or a comment on the community forum.

Looking forward to hearing from you! 

— Team Educative




This lesson provides an overview of what you have learned and the way forward.

Introduction

Impure Implementation

Pure Implementation

Testing Impure Services

Testing Pure Services

Benchmarks

Documentation

Epilogue

Overview and the Way Forward

Lessons learned