Recently I came upon an “Expression Expected” error reported by IntelliJ IDEA’s code analysis on an arrow function. It took me a while to figure out that the issue is related to JavaScript language version support for ECMAScript. Anyhow, the following explains how easy is to resolve the issue. [Read more…]
Tor is a free software that prevents people from learning your location or browsing habits by letting you communicate anonymously on the Internet. This article outlines the process of installing TOR on a Centos/RHEL 7 server and shows how to communicate programmatically through TOR network by using cURL in PHP. [Read more…]
With the recent fast adoption of Internet and cloud environments, the focus of software development shifted from building single user type applications, into a realm of constructing software capable of handling numerous local or remote users. The core benefit of multi-user applications lies in their capacity to tolerate synchronized access from simultaneous users. Other advantages often include the ability to support different types of desktop and mobile devices using a variety of operating systems. [Read more…]
I am not using NetBeans myself but had to work with it on one of the projects. Here is a short guide on how to clone Github project into NetBeans.
The Java recognizes the limited nature of abstract classes and interfaces and their inability to become an object or a traditional class. Nevertheless, it is the absence of the qualities above and the ability to use abstract classes in various objects that proves to be incredibly useful to developers. In this article, I briefly outline the possible application of abstract classes and interfaces as well as provide examples to highlight the contrast between them.
In this article, I illustrate the process of writing a simple Java program. [Read more…]
The following article explains why Java does not support operator overloading and looks at the exception of overloading strings in Java and outlines other concepts, such as method overloading.
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Java recognizes three types of loops, namely ‘for,’ ‘while’ and ‘do-while’ loops that all accomplish the similar goals of iterating the block of code until a certain condition is met. The following article explores the differences between each of the loop variants and demonstrates the situations when choosing one type of loop over the other can be a benefit. There are many examples of using all three types of loops, but I’ve selected the general form and the infinite loop to illustrate the primary differences.
In the following article, I outline the process of making a simple interest calculator in Java and leveraging Swing GUI widget toolkit for Java. [Read more…]
Let’s say we have 3 arrays of following tetromino letters: J, L, O. Tetromino J is a 4 member long array (J[0],J[1],J[2],J[3]), signifying the number of positions J block can take. L tetromino is also a 4 member long array and O is a square tetromino that has only one position (1 member long array). How do we calculate the total number of all unique n-letter long permutations, without programmatically permuting through them? [Read more…]
Java offers eight primitive data types which are not always adequate to store data of all types. There are situations when the specific data type does not fit into any of the primitive data types offered by Java. Thus it is essential to understand the boundaries and restrictions of the primitive data types in Java. In this article, I demonstrate a couple of the scenarios in which the Java data types are not sufficient enough and require substitute approach.
Following is the first article in a series Java for Beginners that shows how to write an application class in Java and introduces the reader to dialog boxes, string to integer conversion and other basics of Java. [Read more…]
Robocopy (aka “Robust File Copy”) is a very useful command-line directory and file replication tool that replaces and enhances the functionality of Xcopy, adding a slew of valuable options, especially when it comes to file synchronizations, mirroring and file backups in general. [Read more…]
In the first post, I have explained how to schedule nightly backups of Amazon Lightsail Instance by leveraging AWS Command Line Interface (CLI). In this post, I’ll show you how to create a bash file that can be scheduled to remove old AWS Lightsail snapshots and retain only a specific number of snapshots in your account.