In this article, we learned how to convert a string case in an array. We’ll do so by solving a coding test problem, reflecting on...

We’ve learned about string concatenation. We’re going to learn about it by solving a coding test problem, reflecting on the problem we solved, and exploring...

In this article, we learned about different operations based on the length of an array. We’ll do this by solving coding test problems, reflecting on...

This article introduces bubble sorting. In preparation for a coding test, I’ve been studying algorithms, and in this article, I’d like to summarize the bubble...

This article introduces HashMap. I’m preparing for a coding test, and I’m writing this down to introduce a useful tool in Java.