Kt. Academy Blog

Function types

What is a function type, and what less known features it offers.

Essential programming nomenclature

Find out what you need to know, before you start writing documentations, books or articles about programming.

Collection processing in Kotlin: Grouping elements

How do we group collection elements in Kotlin, and how is that useful in a variety of algorithms.

Collection processing in Kotlin: Finding, counting, and checking conditions

Let's learn about finding elements, counting those that fulfill a predicate, or checking predicates for all elements.

Function references

How do we reference functions in Kotlin, to replace lambda expressions. All functions, including constructors, getters, extensions and more.

Collection processing in Kotlin: drop and take

How to take the first n elements? Of all except the first n? Let's learn about drop, take, dropLast and takeLast.

Collection processing in Kotlin: Using indices

Just because we use use functional processing function, does not stop us from using indices. Let's learn about withIndex and indexed variants of important functions.

Collection processing in Kotlin: Folding and reducing

Folding stands behind nearly all collection processing functions. fold and reduce are our super agents, we can use whenever we cannot find more specific collection processing function.

Collection processing in Kotlin: Basic functions

One of the most useful applications of functional programming is collection processing. Let's learn about essential collection processing functions. That is also a start of a series of articles about functional collection processing functions.

Best Principles for Successful Test Automation (API and UI)

Aligning our testing activities with ISTQB standards helps us to perform efficiently and cope with project scope and deadlines. In this workshop we will go over software testing stages starting from definition to maintenance.

Mesut Durukal
Mesut Durukal

Leveraging AI in Software Testing

As AI is confronting us in our daily lives and it is improving the development activities by eliminating some manual efforts, it is beneficial to embrace in our tasks. We will see how we can utilize AI based algorithms in Software Testing.

Software Testing Standards (Aligned with ISTQB)

Aligning our testing activities with ISTQB standards helps us to perform efficiently and cope with project scope and deadlines. In this workshop we will go over software testing stages starting from definition to maintenance.

Mesut Durukal
Mesut Durukal

How to write a technical book?

A guide for writing technical books.

Persistent memory design choices and use-cases

Let's understand some design choices with persistent memory and use-cases of persistent memory.

Common Kotlin Coroutines use-cases

The most important coroutines use-cases, both for backend and for Android.

Why is Kotlin your next Programming Language?

What is Kotlin, and why it should be your next programming language.

Persistent dictionary

Let's make our in-memory dictionary persistent and understand some concepts of PMDK.

Code or No-code?

What are the strong sides of code and no-code, and why do they constantly fight with each other.

Introducing persistent memory

Let's learn the basics of persistent memory, its characteristics, how it works and the beauty of byte addressability.

In-memory dictionary

Let's begin our journey to understand persistent memory by building an in-memory dictionary.

Persistent memory - Introduction

Do you want to learn about persistent memory? Join this journey to explore persistent memory and build a persistent dictionary.

Funny programming comics

A collection of funny comics for programmers.

Flow under the hood: how does it really work

We will explore how flow and its processing really works.

Kotlin Coroutines book is finally ready!

Find out for whom Kotlin Coroutines was created and what this book is about.

SharedFlow and StateFlow

Known as a replacement for Subject, LiveData, and many more. SharedFlow and StateFlow are powerful coroutines classes, every Kotlin developer should know.

Flattening flow: flatMapConcat, flatMapMerge and flatMapLatest

Let's learn how can we flatMap flow with flatMapConcat, flatMapMerge, and flatMapLatest.

Collecting values on flow: fold and scan

Let's learn how can we accumulate flow values with fold and scan.

Funny programming videos

A collection of funny videos for programmers.

Combining flows: merge, zip, and combine

Let's learn how can we transform two flows into one, with merge, zip, and combine.

Flow lifecycle operations

Let's learn about lifecycle operations, controlling context, and handling exceptions in flow.

Flow building

Every flow needs to start somewhere, so let's explore all the different flow builders.

Advent of Kotlin Solutions

Solutions to the Advent of Kotlin!

Advent of Kotlin: Week 4

Week 4 of the Advent of Kotlin: Parsing JSON

Marcin Moskała
Marcin Moskała

Advent of Kotlin: Week 3

Week 3 of the Advent of Kotlin: k-means clustering

Marcin Moskała
Marcin Moskała

Advent of Kotlin: Week 2

Week 2 of the Advent of Kotlin: Tree algorithms

Advent of Kotlin: Week 1: JSON stringify and possible value parentheses

Week 1 of the Advent of Kotlin: JSON stringify and possible well-formed parentheses

Effective Kotlin Extra Item: Use operators to increase readability

How to use operators to improve readability in Kotlin.

Marcin Moskała
Marcin Moskała

Variables point to objects

A basic feature, that is commonly misunderstood.

Marcin Moskała
Marcin Moskała

Testing Kotlin Coroutines

How we test Kotlin Coroutines, including common Android and backend cases.

Marcin Moskała
Marcin Moskała

Effective Kotlin Item 55: Consider Arrays with primitives for performance-critical processing

What is the difference between using collections and arrays of primitives?

Marcin Moskała
Marcin Moskała

Constructing a coroutine scope

How we generally define coroutine scope on Android and on the backend.

Marcin Moskała
Marcin Moskała

Effective Kotlin Item 53: Consider using groupingBy instead of groupBy

What Grouping is, and how groupingBy instead of groupBy can be a performance optimization.

Marcin Moskała
Marcin Moskała

Coroutine scope functions

How coroutineScope, withContext and other scoping function work, and why it is great.

Exception handling in Kotlin Coroutines

Everything you need to know about the exception handling mechanism in Kotlin Coroutines.

Effective Kotlin Item 52: Consider associating elements to a map

How associateBy is useful to improve the performance of finding elements.

Cancellation in Kotlin Coroutines

Everything you need to know about the cancellation mechanism in Kotlin Coroutines.

Effective Kotlin Item 51: Prefer Sequence for big collections with more than one processing step

What the difference between list and sequence processing is, and when each should be preferred.

Effective Kotlin Item 50: Eliminate obsolete object references

How to help our garbage collector and avoid memory leaks.

Coroutines built-in support vs library

What the difference is between the coroutine functionalities build into language, and those distributed as a library.

Effective Kotlin Item 49: Consider using inline value classes

What value classes are, how to use and inline them.

Coroutines under the hood

A deep dive into how suspension and continuations work under the hood.

Effective Kotlin Item 48: Use inline modifier for functions with parameters of functional types

How inline functions work and why they can be so important for the performance of our application.

What is CoroutineContext and how does it work?

A deep explanation of the coroutine context - the powerful data holder for coroutines.

Effective Kotlin Item 47: Avoid unnecessary object creation

About the most essential rule of performance optimization.

Coroutine builders

How do we start coroutines, what is structured concurrency and how does it work?

Traits for testing in Kotlin

A trick needed when using traits for testing in Kotlin.

Why using Kotlin Coroutines?

The explanation of why coroutines stand out and offer us what hasn't been offered by other technologies.

Effective Kotlin Item 34: Consider a primary constructor with named optional arguments

Why telescoping-constructor pattern and the classic builder pattern are considered outdated in Kotlin.

How does suspension work in Kotlin coroutines?

A deep explanation of how suspension works in Kotlin Coroutines.

Effective Kotlin Item 33: Consider factory functions instead of secondary constructors

What factory functions are and why they are so important patterns for object creation.

Effective Kotlin Item 46: Avoid member extensions

What member extensions are, how they are possible and why we should avoid using them.

Kotlin Coroutines dispatchers

Where we should use each dispatcher from the Kotlin Coroutines library.

Kt. Academy new logo: Phoenix

Why we decided to change our logo, and what is the symbolism of Phoenix.

Effective Kotlin Item 41: Use enum to represent a list of values

When should we use enum classes, and when sealed classes instead? What are the advantages of both approaches?

Effective Kotlin Item 36: Prefer composition over inheritance

Years of OOP made us overuse inheritance. Instead, we should more often use a composition that is safer and more explicit. More often, but not always...

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