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Konstantin Volohovsky

Posts: Konstantin Volohovsky

Nov 17 2025
How to copy a tree, but not word for word
Konstantin Volohovsky
Interviewers and LeetCode problems often focus on rotating binary trees. But what about transforming a general tree into a different one? How do we solve this problem, and what approaches can...
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Looking for potential vulnerabilities in code, part 2: practice
Konstantin Volohovsky
Last time, we discussed common approaches to detecting vulnerabilities in applications. This time, we'll take a more down-to-earth look at how we've implemented these mechanisms in our...
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Dec 26 2024
Top 10 most intriguing Java errors in 2024
Konstantin Volohovsky
In 2024, we've analyzed a wealth of projects, sharing our discoveries on our blog. Now it's New Year's Eve—it's time to tell festive tales! We've collected the most intriguing Java errors detected...
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Looking for potential vulnerabilities in code, part 1: theory
Konstantin Volohovsky
We all know the risks that vulnerabilities pose: application crashes, data loss, or privacy breaches. In this article, we'll look at examples that illustrate the core aspects of an approach...
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Sep 10 2024
Time to refactor legacy with OOP
Konstantin Volohovsky
Years pass, and projects overgrow dark spots that nobody wants to venture into—they're too tricky and prone to failure. Today, we're diving into refactoring legacy code with OOP. And we're gonna...
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How to develop code analyzer in 48 hours
Viktoria Pelipenko, Kirill Epifanov, Konstantin Volohovsky
Static analysis is a robust tool that helps developers to control code quality. Let's try to develop a simple analyzer for Lua using Java and see what's under the static analyzer...
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Jul 31 2024
Sponsored: Modern Static Code Analysis the Example of PVS-Studio
Konstantin Volohovsky
How can you detect potential errors yet at the development stage? The technology of static analysis helps to answer this question. We will explore what it is and how it works using the example of a modern code analyzer, PVS-Studio. We will consider practical examples o…
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Jun 17 2024
How template method can ruin your Java code
Konstantin Volohovsky
OOP is wonderful. Programmers usually criticize those who don't follow this paradigm, while the knowledge of patterns is often a must. However, even the right approach doesn't completely protect...
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Jun 05 2024
Volatile, DCL, and synchronization pitfalls in Java
Konstantin Volohovsky
What if common knowledge is actually more nuanced, and old familiar things like Double-checked locking are quite controversial? Examining the code of real projects gives this kind of thought. In...
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OOP in real-life cases
Konstantin Volohovsky
In most cases, you can solve a task in an intuitive, procedural way. However, the simplest option isn't always the best. I invite you to take a look at a real-world example of transforming a...
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