Sort Binary Tree by Levels using Python
The challenge You are given a binary tree: Your task is to return the list with elements from tree sorted by levels, which means the… Read More »Sort Binary Tree by Levels using Python
How to Split a String with Python
Splitting a string in Python is really easy. You simply take a string and apply the split() method. “Your String”.split() See some examples of the… Read More »How to Split a String with Python
How to fix the Terraform stuck on “Refreshing state…” problem
Terraform is a fantastic tool to help automate your infrastructure as code. Quite a few times however, I have noticed a few strange issues, one… Read More »How to fix the Terraform stuck on “Refreshing state…” problem
The “Split Strings” Challenge using Java
The challenge Complete the solution so that it splits the string into pairs of two characters. If the string contains an odd number of characters… Read More »The “Split Strings” Challenge using Java
Converting to PigLatin with Python
The challenge Move the first letter of each word to the end of it, then add “ay” to the end of the word. Leave punctuation… Read More »Converting to PigLatin with Python
Solving the “Double Cola” Challenge using Java
The challenge Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a “Double Cola” drink vending machine; there are no other people in… Read More »Solving the “Double Cola” Challenge using Java
Convert Seconds to Human Readable Time (HH:MM:SS) using Java
The challenge Write a function, which takes a non-negative integer (seconds) as input and returns the time in a human-readable format (HH:MM:SS) HH = hours, padded… Read More »Convert Seconds to Human Readable Time (HH:MM:SS) using Java
Solving the “Mexican Wave” Challenge using Java
The challenge Task Your task is to create a function that turns a string into a Mexican Wave. You will be passed a string and… Read More »Solving the “Mexican Wave” Challenge using Java
Multiples of 3 and 5 with Python
The challenge This challenge is a variation of the common FizzBuzz question. If we list all the natural numbers below 10 that are multiples of… Read More »Multiples of 3 and 5 with Python
Solving the “Catching Car Mileage Numbers” Challenge using Python
The challenge “7777…8?!??!“, exclaimed Bob, “I missed it again! Argh!” Every time there’s an interesting number coming up, he notices and then promptly forgets. Who doesn’t like… Read More »Solving the “Catching Car Mileage Numbers” Challenge using Python
Counting smiley faces with Python
The challenge Given an array (arr) as an argument complete the function countSmileys that should return the total number of smiling faces. Rules for a smiling face:… Read More »Counting smiley faces with Python
Convert String to Camel Case using Java
The challenge Complete the method/function so that it converts dash/underscore delimited words into camel casing. The first word within the output should be capitalized only if the… Read More »Convert String to Camel Case using Java
How to Setup an SSH Server on AWS
Basic instructions on how to set up an SSH server on an Ubuntu 16.04/18.04 EC2 instance. Step 1 – Create a New User Step 2… Read More »How to Setup an SSH Server on AWS
How to Convert Numeric Words into Numbers using Python
Challenge Using Python, we want to convert words to numbers. In this challenge, we will explore how to convert a string into an integer. The… Read More »How to Convert Numeric Words into Numbers using Python
Solve The Triangle of Odd Numbers using Python
The challenge Given the triangle of consecutive odd numbers: Calculate the row sums of this triangle from the row index (starting at index 1) e.g.:… Read More »Solve The Triangle of Odd Numbers using Python
“Who likes it” code Challenge in Python
The Challenge You probably know the “like” system from Facebook and other pages. People can “like” blog posts, pictures or other items. We want to… Read More »“Who likes it” code Challenge in Python
Python 4 New Features Planned
It took the Python community a long time to move from Python 2 to Python 3. Now as we approach the possible end of Python… Read More »Python 4 New Features Planned
Custom RGB To Hex Conversion with Python
The challenge The rgb function is incomplete. Complete it so that passing in RGB decimal values will result in a hexadecimal representation being returned. Valid… Read More »Custom RGB To Hex Conversion with Python
Sort a Java Integer in Descending Order
The challenge Your task is to make a function that can take any non-negative integer as an argument and return it with its digits in… Read More »Sort a Java Integer in Descending Order
Get the Sum of Digits / Digital Root using Java
The challenge Digital root is the recursive sum of all the digits in a number. Given n, take the sum of the digits of n. If that value has… Read More »Get the Sum of Digits / Digital Root using Java
How to write a Chain Adding Function in Python
The challenge We want to create a function that will add numbers together when called in succession. We also want to be able to continue… Read More »How to write a Chain Adding Function in Python
Get the next biggest number with the same digits using Python
The challenge Create a function that takes a positive integer and returns the next bigger number that can be formed by rearranging its digits. For… Read More »Get the next biggest number with the same digits using Python
Solving Tribonacci Sequence with Python
The challenge As the name may already reveal, it works basically like a Fibonacci, but summing the last 3 (instead of 2) numbers of the… Read More »Solving Tribonacci Sequence with Python
The Casino Chips Problem Solved with Python
The challenge You are given three piles of casino chips: white, green and black chips: the first pile contains only white chips the second pile… Read More »The Casino Chips Problem Solved with Python
Check if Isogram using Python
The challenge An isogram is a word that has no repeating letters, consecutive or non-consecutive. Implement a function that determines whether a string that contains… Read More »Check if Isogram using Python