Cryptanalysis Word Patterns in Java
The challenge In cryptanalysis, words patterns can be a useful tool in cracking simple ciphers. A word pattern is a description of the patterns of… Read More »Cryptanalysis Word Patterns in Java
How to divide a number in Python
The challenge Your task is to create functionisDivideBy (or is_divide_by) to check if an integer number is divisible by each out of two arguments. A few cases:… Read More »How to divide a number in Python
How to Read Kubernetes Secrets
Kubernetes secrets is a great way to store secret values that only Kubernetes can access in your hosted applications. There are times when you might… Read More »How to Read Kubernetes Secrets
Backspaces in String Challenge using Java
The challenge Assume “#” is like a backspace in string. This means that string “a#bc#d” actually is “bd” Your task is to process a string with “#” symbols. Examples Test cases The… Read More »Backspaces in String Challenge using Java
How many times to Kaprekar’s constant using Python
Introduction 6174 is known as Kaprekar’s constant after the Indian mathematician D. R. Kaprekar. This number is notable for the following rule: Take any four-digit number, using at least two… Read More »How many times to Kaprekar’s constant using Python
How to check if a String is a Number in Python
The challenge Given a string s, write a method (function) that will return true if its a valid single integer or floating number or false… Read More »How to check if a String is a Number in Python
How to Write a Custom Comparator in Python
Generally, you want to use the built-in sorted() function which takes a custom comparator as its parameter. We need to pay attention to the fact that in… Read More »How to Write a Custom Comparator in Python
How to delete an AWS WAF – Web ACL
Usually, it’s quite easy to delete an AWS WAF, or Web ACL. But sometimes you may come across the following error when attempting to delete… Read More »How to delete an AWS WAF – Web ACL
How to Sort an Integer in Python
Let’s say that you have an integer with value of 9271 and you want to sort it either ascending(1279) or descending(9721). How would you do… Read More »How to Sort an Integer in Python
How to Upgrade PIP
In this tutorial, you will learn how to upgrade PIP. You will also learn how to check the current version of PIP, as well as… Read More »How to Upgrade PIP
How to Copy a File in Python
In this tutorial, you will learn how to copy a file using Python from a directory to another directory, or if you’re on Windows, then… Read More »How to Copy a File in Python
Conway’s Game of Life – Unlimited Edition – in Python
What is this? Conways’s Game Of Life is a Cellular Automation Method created by John Conway. This game was created with Biology in mind but… Read More »Conway’s Game of Life – Unlimited Edition – in Python
Most frequently used words in a text with Python
The challenge Write a function that, given a string of text (possibly with punctuation and line-breaks), returns an array of the top-3 most occurring words,… Read More »Most frequently used words in a text with Python
The SongDecoder Dubstep Challenge with Java
The challenge Polycarpus works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided… Read More »The SongDecoder Dubstep Challenge with Java
Break camelCase Challenge in Java
The challenge Complete the solution so that the function will break up camel casing, using a space between words. Example Test cases The solution in… Read More »Break camelCase Challenge in Java
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