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 →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
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 …
Read Article →How to Find the Max Tree Node Value in Java
The challenge
You are given a binary tree. Implement the method findMax which returns the maximal node value in the tree.
For example, the maximum in …
Read Article →How to String Search with a Wildcard in Java
The challenge
The method below is the most simple string search algorithm. It will find the first occurrence of a word in a text string.
haystack = …
How to get the AWS AccountID in Terraform
If you are automating AWS resources in Terraform, then you will want to not hardcode things as much as possible.
Terraform makes it possible to pull …
Read Article →Error creating AppStream Fleet – InvalidRoleException
If you get the following error when trying to run some Terraform:
error creating Appstream Fleet (): InvalidRoleException: AppStream 2.0 encountered …
How to Create AWS AppStream resources in Terraform
AWS AppStream has finally made its way into the Terraform AWS Provider.
If you are using hashicorp/aws version 3.67 or above, then you can do the …
How to Stop a Goroutine in Golang
It’s possible to stop a Goroutine by sending a value into it via a signal channel:
exit := make(chan bool)
go func() {
for {
select …How to Create an Empty Branch in Git
If you need to create an empty branch in git, you can follow one of the below options.
If you are using git version 2.27 or newer, then follow the …
Read Article →Get the Consonant Value in Java
The challenge
Given a lowercase string that has alphabetic characters only and no spaces, return the highest value of consonant substrings. Consonants …
Read Article →How to Check for Factor in Python
The challenge
This function should test if the factor is a factor of base.
Return true if it is a factor or false if it is not.
About factors …
Read Article →Understanding Bitwise Operators in Python
There are 6 binary/bitwise operators in Python:
- Complement/Not (
~) - And (
&) - Or (
|) - XOR (
^) - Left Shift (
<<) - Right Shift (
>>)
A …
Read Article →Word Values Challenge in Java
The challenge
Given a string "abc" and assuming that each letter in the string has a value equal to its position in the alphabet, our string …
How to update/upgrade all Homebrew packages
If you use Homebrew – and you probably should if you’re on a Mac – then you have probably installed various different applications and packages …
Read Article →[Solved] FirebaseError: Missing or insufficient permissions
Using Firebase and get the following error in the console?
Uncaught Error in onSnapshot: FirebaseError: Missing or insufficient …
[Solved] Error: Cannot find module ‘../lib/cli.js’
If you try and run npm i and get Error: Cannot find module '../lib/cli.js', then you can easily fix the problem by running the following.
How does the …
Read Article →How to use Git Commit in GitHub Actions
If you’ve tried to use git commit in GitHub Actions before, you may have come across the following error messages:
Author identity unknown
*** …[Solved] Error acquiring the state lock in Terraform
If you have been handed the Acquiring state lock error message about ConditionalCheckFailedException: The conditional request then you have 2 options …