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 →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
[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 …
How to “Dashatize It” in Java
The challenge
Given a variable n,
If n is an integer, Return a string with dash'-'marks before and after each odd integer, but do not begin or end the …
How to create a Nickname Generator in Python
The challenge
Write a nickname generator function, nicknameGenerator that takes a string name as an argument and returns the first 3 or 4 letters as a …
Comparing Array Multiplicities in Java
The challenge
Given two arrays a and b write a function comp(a, b) (orcompSame(a, b)) that checks whether the two arrays have the “same” …
How to Find the Sum of Angles in Golang
The challenge
Find the total sum of internal angles (in degrees) in an n-sided simple polygon.
N will be greater than 2.
The solution in Golang
Option …
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