John Selawsky Senior Java Developer and Tutor at LearningTree
A senior Java developer and Java tutor at Learning Tree International programming courses. Sometimes I write some stupid programming stuff about Java.
7 years experience of Java/J2EE development. In Java We Trust.
Author's articles
- November 7, 2024 at 1:52 PMLength of an Array in PythonHey there, If you've ever found yourself wondering, "How do I find out the length of an array in Python?" then you've come to the right place. This article is going to walk you through everything you need to know about determining the length of an array in Python
11/7/24 450views 0comments
2 - July 30, 2024 at 3:58 PMConvert JSON to CSV in PythonHello, Python enthusiasts! Today, we're tackling a common data conversion task: converting JSON to CSV. By the end of this article, you'll be equipped with the knowledge and tools to easily transform JSON data into CSV format using Python.
7/30/24 638views 0comments
2 - May 10, 2023 at 1:15 PMString Array in JavaOften the first data structure a novice programmer gets acquainted with is an array. That's because arrays are fairly easy to learn. A one-dimensional array is a sequence that consists of a fixed number of cells in which data can be stored. In the case...
5/10/23 2854views 0comments
2 - March 7, 2023 at 12:34 PMJava floor() methodA floor function which is also known as the greatest integer function in maths takes a real number “x” as an input. It returns the greatest integer that is less than or equal to input number x. It is normally denoted as floor(x) or ⌊x⌋. It is used...
3/7/23 5437views 0comments
11 - January 11, 2023 at 12:26 PMMethods in JavaHello again! In the last lesson we got acquainted with classes and constructors, and learned how to create our own. Today we will become better acquainted with methods, an essential part of classes. A method is a set of commands which allow you to perform a specific operation in a program ...
1/11/23 60017views 139comments
427 - December 1, 2022 at 3:00 PMA* Search Algorithm in JavaDifferent search algorithms are tailored for different tasks. Today we are going to talk about A* search, one of the most effective pathfinding algorithms. This one is very well suited for computer games and building searching graphs such as ways between cities and so on.
12/1/22 5400views 0comments
2 - September 15, 2022 at 10:59 AMStrategy Design PatternHi! In previous lessons, we've already briefly become acquainted with the concept of inheritance. In case you forgot, I'll remind you that this term refers to a standard solution to a common programming task. At CodeGym, we often say that you can google the answer to almost any question...
9/15/22 4718views 2comments
20 - August 29, 2022 at 7:29 AMXML in JavaHi! Today we will introduce another data format called XML. This is a very important topic. When working on real Java applications, you will almost certainly encounter XML-related tasks. In Java development, this format is used almost universally (we will find out why below), so I recommend...
8/29/22 5096views 3comments
24 - July 14, 2022 at 10:43 AMSubstring in JavaThis article is about substring () methods in Java language. Here you will find the explanation of how using these methods, find out how they work and get some beneficial examples. Substring in general is a contiguous sequence of characters inside the String. It could be a part of the String or the whole String as well...
7/14/22 18110views 0comments
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