Skip to main content

Scala Design Patterns Book Review

Introduction
There are many books about scala, some are both advanced and incomprehensible to most, some are not only simple and introductory, but there is currently only one book which managed to touch the sweet spot of a balance between presenting advanced topics and being comprehensible. This book is Scala Design Patterns by John Hunt.
Scala Design Patterns
I don't read it because of the design patterns!
I mean you can read this book in two ways. First way as a standard scala design patterns book. But the way I read it, is as a book written by an excellent writer who knows to explain himself, excellently, and as he want's to describe the design patterns in scala language, he describes scala concepts, and he manages to do it much better than every book i have seen so far!
What the book covers
So what does the book cover, or what did I learn from it? many things I found hard to grasp by other books! here is the list:
  1. Mixin composition - Will guide you on how to compose functionality
  2. Multiple inheritance and scala - Will show you how scala solves or get's around the multiple inheritance problem
  3. Linearization - The linearization process is the process by which scala get's around the multiple inheritance problem, here is a clear explanation of it!
  4. Testing traits - Best practices for testing traits the scala way
  5. Traits vs classes - When do you prefer classes to traits and vice versa how to properly combine them
  6. Implicits - Advanced usage of implicits - again clear and great explanations
  7. Algebric data types and class hierarchies - An excellent explanation of ADT
  8. Polymorphiosm and scala - The way scala views polymorophism pitfalls and how to utilize it
  9. Self types and when to use - What is a self type how to use, again excellent description with real world examples
  10. Stackable traits
  11. Typeclasses
  12. Lazy evaluation
  13. Partial functions
  14. Implicit injection
  15. Duck typing
  16. Memoization
  17. Monoids
  18. Monads
  19. Functors
  20. Lens
Do you see the book is just amazing, and he does an excellent job describing these topics not as other books!
Conclusion
Scala Design Patterns by John Hunt is my favorite book to learn scala and functional programmning in scala!

Comments

Post a Comment

Popular posts from this blog

Dev OnCall Patterns

Introduction Being On-Call is not easy. So does writing software. Being On-Call is not just a magic solution, anyone who has been On-Call can tell you that, it's a stressful, you could be woken up at the middle of the night, and be undress stress, there are way's to mitigate that. White having software developers as On-Calls has its benefits, in order to preserve the benefits you should take special measurements in order to mitigate the stress and lack of sleep missing work-life balance that comes along with it. Many software developers can tell you that even if they were not being contacted the thought of being available 24/7 had its toll on them. But on the contrary a software developer who is an On-Call's gains many insights into troubleshooting, responsibility and deeper understanding of the code that he and his peers wrote. Being an On-Call all has become a natural part of software development. Please note I do not call software development software engineering b

SQL Window functions (OVER, PARTITION_BY, ...)

Introduction When you run an SQL Query you select rows, but what if you want to have a summary per multiple rows, for example you want to get the top basketball for each country, in this case we don't only group by country, but we want also to get the top player for each of the country.  This means we want to group by country and then select the first player.  In standard SQL we do this with joining with same table, but we could also use partition by and windowing functions. For each row the window function is computed across the rows that fall into the same partition as the current row.  Window functions are permitted only in the  SELECT  list and the  ORDER BY  clause of the query They are forbidden elsewhere, such as in  GROUP BY ,  HAVING  and  WHERE  clauses. This is because they logically execute after the processing of those clauses Over, Partition By So in order to do a window we need this input: - How do we want to group the data which windows do we want to have? so  def c

Functional Programming in Scala for Working Class OOP Java Programmers - Part 1

Introduction Have you ever been to a scala conf and told yourself "I have no idea what this guy talks about?" did you look nervously around and see all people smiling saying "yeah that's obvious " only to get you even more nervous? . If so this post is for you, otherwise just skip it, you already know fp in scala ;) This post is optimistic, although I'm going to say functional programming in scala is not easy, our target is to understand it, so bare with me. Let's face the truth functional programmin in scala is difficult if is difficult if you are just another working class programmer coming mainly from java background. If you came from haskell background then hell it's easy. If you come from heavy math background then hell yes it's easy. But if you are a standard working class java backend engineer with previous OOP design background then hell yeah it's difficult. Scala and Design Patterns An interesting point of view on scala, is