The JetBrains Blog

Advent Of Code is currently ongoing and many people all over the world are taking part. We’d like to share some tips and tricks for solving the puzzles in Kotlin – we hope you find some of them helpful! Feel free to add your favorite tips or thoughts in the comments!. If you’re solving the puzzles i…

The nautical advent-ure continues with the third day of AOC 2021, which we will, of course, once more solve in Kotlin! This time, it will involve wrangling binary numbers in all sorts of ways. Check out the solution and a detailed explanation on YouTube, or follow along as we explain our solution in…

In this post, I’m going to walk you through my solution to the Advent of Code 2021 Day 1 task. Of course, I used Kotlin to solve it!  https://www.youtube.com/embed/76IzmtOyiHw The input for the task is a text file, where each line is a number that represents a measurement of the depth o…

It’s that magical time of the year! Supermarkets are stocking cookies, the smell of cinnamon and roasted chestnuts fills the air, and maybe you’ll even see some snowflakes fall in front of your window. It can only mean one thing: Advent of Code is coming! It starts December 1, when the first of …

This post continues our “Idiomatic Kotlin” series and provides the solution for the Advent of Code Day 9* challenge. While solving it, we’ll look into different ways to manipulate lists in Kotlin. Day 9. Encoding error, part I We need to attack a weakness in data encrypted with the eXchang…

Today in “Idiomatic Kotlin”, we’re solving another Advent of Code challenge. We will be simulating, diagnosing, and fixing a small, made up game console! If you have ever wanted to implement your own virtual machine or emulator for an existing system like a game console or a retro computing device, …

Let's describe our task briefly. We are airport luggage throwers handlers, and as often happens, there are some new regulations. This time, they stipulate that all bags be color-coded and contain a specific number of color-coded bags inside them. Weird, right? Well, rules are rules, so we must compl…

Grouping and counting the characters in strings and collections is a very typical task given in coding interviews. Usually, the solutions for such tasks are quite simple. In this blog post, we learn about a few useful functions in Kotlin that make set operations really simple. The task: custo…

Let’s continue our journey of understanding what “idiomatic Kotlin” means and solve one more puzzle from the Advent of Code challenge. The puzzles are independent of each other, so you don’t need to check any of the previous ones we’ve already covered. Simply read through the following solution or w…

Today in “Idiomatic Kotlin”, we’re looking at day 4 of the Advent of Code 2020 challenges, in which we tackle a problem that feels as old as programming itself: input sanitization and validation. (more…)…

Today we have great news for those of you who are just starting out on your programming journey with Kotlin or who want to develop new programming skills. JetBrains Academy recently released a new Kotlin Basics track! It helps you get to grasps with all the Kotlin programming language essentials as …