Playing the Bulls and Cows Game in Java
The challenge
You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number …
Read Article →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
Calculate the Sum of Root To Leaf Binary Numbers in Java
The challenge
Given a binary tree, each node has value `` or 1. Each root-to-leaf path represents a binary number starting with the most significant …
Remove an Exclamation Mark from the End of String using Python
The challenge
Remove a exclamation mark from the end of string. You can assume that the input data is always a string, no need to verify it.
Examples …
Read Article →How to “Rock Paper Scissors” in Java
The challenge
Let’s play Rock Paper Scissors! You have to return which player won! In case of a draw return Draw!.
Examples: …
Read Article →Compare within Margin using Python
The challenge
Create a function close_compare that accepts 3 parameters: a, b, and an optional margin. The function should return whether a is lower …
Get the mean of an array in Java
The challenge
It’s the academic year’s end, fateful moment of your school report. The averages must be calculated. All the students come …
Read Article →Remove the time challenge in Python
The challenge
You’re re-designing a blog and the blog’s posts have the following format for showing the date and time a post was made: …
Read Article →How to Convert Hex to Decimal in Java
The challenge
Write a function that converts an input string contains a hex value, and return a decimal.
Test cases
import org.junit.Test;
import …Character with Longest Consecutive Repetition in Java
The challenge
For a given string s find the character c (or C) with longest consecutive repetition and return:
Object[]{c, l};
where l (or L) is the …
Check if List contains Item in Python
The challenge
Create a method that accepts a list and an item, and returns true if the item belongs to the list, otherwise false.
Test cases
list = …How To Create a User and Grant Permissions in MySQL
How to create a user
CREATE USER 'myuser'@'localhost' IDENTIFIED BY 'mypassword';
How to delete a user
DROP USER …How to Remove Vowels with Python
The challenge
Create a function called shortcut to remove all the lowercase vowels in a given string.
Examples
shortcut("codewars") # --> …