Count the number of Duplicates in Java
The challenge
Write a function that will return the count of distinct case-insensitive alphabetic characters and numeric digits that occur more than …
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In-depth guides, insights, and best practices for modern software engineering
Calculating Simple Max Digit Sum in Java
The challenge
In this challenge, you will be given an integer n and your task will be to return the largest integer that is <= n and has the …
The String Combat Challenge in Java
The challenge
After a long conflict, the rulers of Nek and Glo have decided that a final duel should decide the fate of their countries. Each ruler …
Read Article →Solving Single Word Pig Latin in Java
The challenge
Pig Latin is an English language game where the goal is to hide the meaning of a word from people not aware of the rules.
So, the goal …
Read Article →Count the Days in Java
The challenge
Little Annie is very excited for upcoming events. She want’s to know how many days she have to wait for a specific event.
Your job …
Read Article →Java HashMap Create or Increment Value
If you are using a HashMap to keep a running total of a series of elements, then you often need to increment a HashMap item, but if it doesn’t …
Get the Strongest even number in an interval in Java
The challenge
A strongness of an even number is the number of times we can successively divide by 2 until we reach an odd number starting with an even …
Read Article →What time is it? in Java
The challenge
How many times have we been asked this simple question in our daily lives by family, friends and strangers alike?
In this challenge you …
Read Article →Building a String Pyramid in Java
The challenge
You have to build a pyramid.
This pyramid should be built from characters from a given string.
You have to create the code for these …
Read Article →Cartesian coordinates from degree angle in Java
The challenge
Write a simple function that takes polar coordinates (an angle in degrees and a radius) and returns the equivalent cartesian coordinates …
Read Article →Sort array by sorting its smallest sub-array in Java
The challenge
Given an array of integers, arr, find out 2 indices m, n(0<=m<=arr.length-1, 0<=n<=arr.length-1, m<=n), so that as long …
Read Article →Excessively Abundant Numbers in Java
The challenge
An abundant number or excessive number is a number for which the sum of its proper divisors is greater than the number itself.
The …
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