How to Create a Java GUI App that shows the Logged-in User and Hostname
Create a new file called Application.java and paste the following:
import javax.swing.*;
import java.net.InetAddress;
import …Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to view a Terraform Module’s Output
An output in Terraform is a way to view the result of an action that has been performed, or resource that has been created.
Let’s say that you …
Read Article →How to Count the Characters in Python
The challenge
The goal of this challenge is to write a function that takes two inputs: a string and a character. The function will count the number of …
Read Article →How to Install Cuda driver for Nvidia on Ubuntu
If you have just upgraded Ubuntu on your AWS g4dn instance and need to install/reinstall Cuda drivers for your Nvidia chipset, then you can run the …
Read Article →How to List all Running Services on Ubuntu
If you need to view a list of all the services that are either running or stopped (or both) on an Ubuntu server, then you can use the following …
Read Article →[Solved] conflict: unable to remove repository reference in Docker
If you get the following error while trying to delete an image in Docker:
Error response from daemon: conflict: unable to remove repository reference …
How to Upgrade an Ubuntu Server
Upgrading an Ubuntu Server is quite easy, just follow the below commands:
Option 1: Tldr; (just run the below!)
sudo apt-get update && sudo …How to Solve Two-Sum in Java
The challenge
Write a function that takes an array of numbers (integers for the tests) and a target number. It should find two different items in the …
Read Article →How to Sort the Gift Code in Java
The challenge
Santa’s senior gift organizer Elf developed a way to represent up to 26 gifts by assigning a unique alphabetical character to each …
Read Article →How to get the Numericals of a String in Java
You are given an input string.
For each symbol in the string if it’s the first character occurrence, replace it with a ‘1’, else replace …
Read Article →How to Replace Noun Phrases with Pronouns in Golang
The challenge
A Noun Phrase is a phrase that can be replaced by a pronoun [he/she/it].
For example, in the sentence:
a girl ate the cookie
“A …
Read Article →Maximum Positive Integer Rotations in Golang
The challenge
Write function MaxRot(n) which given a positive integer n returns the maximum number you got doing rotations similar to the above …