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Julien Richard-Foy
Functional Program (Re)Design

We are excited to announce the release of a new version of the online course Functional Program Design.

As a reminder, the Scala Center runs freely accessible online courses that have been completed by more than 5700 learners in 2019. Optionally, a paid version delivers a certificate of completion.

Why a New Version?

The previous version of the course was made of parts of older courses mashed up together and the end result was not always consistent. Furthermore, the part about asynchronous programming with Future overlapped with our other course Programming Reactive Systems, which covers this topic and more.

Last but not least, an important language feature was previously absent from our online courses: programming with implicits.

The new version of Functional Program Design fixes these issues by replacing the old material about Future with an entire week of new material dedicated to implicits.

Syllabus of the New Version

The syllabus of the new version of the course is the following:

  • Week 1: Learn how to use “for expressions” to traverse collections and other data structures. See how for expressions are “desugared” into calls to higher-order functions by the Scala compiler. Discover what monads are and how to verify that their laws are satisfied for a number of examples.
  • Week 2: Understand what lazy evaluation is and how it can be leveraged to write efficient algorithms. Reason about and prove properties on inductive data structures.
  • Week 3: Learn how to use implicit parameters and how to write implicit definitions. Understand the rules used by the compiler to search for implicit values and to assign a higher priority to an implicit definition. Discover the type class pattern. Leverage type-directed programming to let the compiler “implement” data types serializers and deserializers for you.
  • Week 4: Learn programming patterns for managing state and side-effects in large programs. Understand the implications of using var on the ability to reason about code.
  • Week 5: Discover important programming patterns via examples, starting with the observer pattern, and then going on to functional reactive programming.

All Our Online Courses

In total, we have 6 running courses, ranging from the basics of the language to more specific programming techniques:

Our next goals are to update the courses to Scala 3 and to publish a new self-contained course targeting beginners and aiming at delivering practical skills (how to model a business domain, how to process and validate data, how to use a build tool, etc.).

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