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Effective Kotlin updates & news from Kt. Academy

Hello, Kt. Academy here 👋

After a little break, we’re coming to you with some new content and exciting news!

✅ We’re now updating the “Effective Kotlin” book and publishing some of its items on our blog.
✅ There’s a new login system and user profile on the website.
✅ We’ve added consultations with experts to our offer!
✅ New workshops are here!
✅ Quick info for our Polish audience.


It’s a general OOP rule to prefer composition over inheritance, but Kotlin encourages composition even more.
You’ll learn more from the article “Prefer composition over inheritance”, which is a part of the “Effective Kotlin” book written by Marcin Moskala👇

To make our website more intuitive and easy to use we’ve created a new login system. From now on you can log in with only 2 clicks and manage your profile and preferences from the new panel.

It’s never been that easy before! 👇

Remember that you can now book a consultation with an expert for your company or yourself!
We are ready to help no matter if you need one hour or constant support.

Go to the workshop page that you’re interested in and fill out the form👇

We are constantly working on expanding our offer, so everyone can find something for themselves 🤩

There are a few new workshops that you can register for on our website now:
➡️ JavaScript for beginners
➡️ Modern JavaScript
➡️ TypeScript
➡️ Android application development

If you are interested in any of our workshops simply visit our website and fill the proper form, or if you have any other specific needs, feel free to contact our consultant at or call the number +48 512–442–052.

To our Polish audience 🇵🇱

We’re publishing articles to help newbies learn JavaScript from scratch — and we’ll be publishing them as a book soon!
Some are pure JavaScript content, others are more general, such as “How to learn programming”.
You can find all of them on our blog 👉

If you want to help to improve this content leave us your comments using a small chat icon on the right side 💬 or become our reviewer by filling the form at the bottom of the article page ⍰

Also, to keep up to date with all the content in Polish, you can follow our new Twitter account — Kt. Academy PL.

Thanks and see you soon!

Kt. Academy Team

Effective Kotlin updates & news from Kt. Academy was originally published in Kt. Academy on Medium, where people are continuing the conversation by highlighting and responding to this story.

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Kotlin for Interviews series

Hello and happy Friday!

In the first half of November, we published a series of 5 Kotlin for Interviews articles written by Sherry Yuan. They cover data structures, collection functions, math, common algorithms, and other parts of Kotlin that are important to know for technical interviews.

You will find them all below!

But first, check “Kotlin for Interviews” cheat sheet that compiles an overview of code snippets that are coming up often during the interviews.

Part 1: Common Data Types

It covers a few common data types that appear often in algorithms and data structures questions, eg. MutableList, HashMap, or PriorityQueue.

Part 2: Collection Functions

This part covers Collection Functions topics: getters, search and find, sorting, boolean summary and statistical summary.

Part 3: Numbers and Math

It covers numbers and math topics, like number types and math operators, as well as useful functions and constants.

Part 4: Iteration

This part covers Refresher on Range, 1D arrays/lists, 2D arrays/lists, Maps and PriorityQueues.

Part 5: Frequently Used Code Snippets

It covers frequently used code snippets, like creating graphs in adjacency list form, breadth and depth-first search, tree traversal and dynamic programming/memoization.

Happy coding!
Kt. Academy Team

Kotlin for Interviews series was originally published in Kt. Academy on Medium, where people are continuing the conversation by highlighting and responding to this story.

Continue Reading Kotlin for Interviews series

Great articles & Bonus

New great articles & Bonus

Since our last Medium newsletter, we have published a few amazing articles. Let’s go through them now!


Plus something extra!

We want to remind you that Hacktoberfest is still running! For those who haven’t heard about it yet — it’s the time when developers are hacking open source projects for fun, self-development, and for doing something good.

Here’s an article written by Jean-Michel Fayard where you can find more information about it — Contribute to the Kotlin Libraries Playground for Hacktoberfest!


In the Advent of Kotlin 2018, we learned how to implement mocks, dependency injection library, sorted list, find the shortest path. It was quite a challenge, and we are proud of it! 😉

If you missed it, you can learn it now on our new course. Have fun!

We are not slowing down and still run workshops for developers:

To make your journey through the courses more intuitive, we have gathered all the workshops under one button “Workshops”.

Moreover, to make the registration process easier, we have added prices and separate forms for open and private workshops.

❗All the workshops can be conducted online.

For more information visit our website or contact us at

Happy coding!
Kt. Academy Team

Great articles & Bonus was originally published in Kt. Academy on Medium, where people are continuing the conversation by highlighting and responding to this story.

Continue Reading Great articles & Bonus

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