Determine the Highest Scoring Word in Java
The challenge
Given a string of words, you need to find the highest scoring word.
Each letter of a word scores points according to its position in the …
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In-depth guides, insights, and best practices for modern software engineering
Solving Speed Control in Java
The challenge
In John’s car the GPS records every s seconds the distance travelled from an origin (distances are measured in an arbitrary but …
Calculate Miles per Gallon to Kilometers per Litre in Java
The challenge
Create an application that will display the number of kilometers per liter (output) based on the number of miles per imperial gallon …
Read Article →How to Convert an Int to a List of Ints in Python
The challenge
Given a non-negative integer, return an array / a list of the individual digits in order.
Examples:
123 => [1,2,3]
1 => [1] …Find the Greatest Common Divisor in Java
The challenge
Find the greatest common divisor of two positive integers. The integers can be large, so you need to find a clever solution.
The inputs …
Read Article →How to Create a Circular List in Python
The challenge
Create a Circular List
A circular list is of finite size, but can infititely be asked for its previous and next elements. This is …
Read Article →How to Guess the Sequence in Java
The challenge
You must guess a sequence and it has something to do with the number given.
Example
x = 16
result = [1, 10, 11, 12, 13, 14, 15, 16, 2, …Reversed sequence in Java
The challenge
Build a function that returns an array of integers from n to 1 where n>0.
Example : n=5 –> [5,4,3,2,1]
The solution in Java code …
Read Article →Count the Digit in Java
The challenge
Take an integer n (n >= 0) and a digit d (0 <= d <= 9) as an integer. Square all numbers k (0 <= k <= n) between 0 and n. …
Multiply all elements in an array in Java
The challenge
Create a function multiplyAll/multiply_all which takes an array of integers as an argument. This function must return another function, …
[Solved] Fatal: refusing to merge unrelated histories in Git
You have received the dreaded fatal: refusing to merge unrelated histories error!
You might find yourself asking one of the following questions:
- What …
Credit Card Mask in Java
The challenge
Usually when you buy something, you’re asked whether your credit card number, phone number or answer to your most secret question …
Read Article →How to Reverse a Number in Java
The challenge
Given a number, write a function to output its reverse digits. (e.g. given 123 the answer is 321)
Numbers should preserve their sign; …
Read Article →Positions Average in Java
The challenge
Suppose you have 4 numbers: '0', '9', '6', '4' and 3 strings composed with them:
s1 = "6900690040"
s2 = "4690606946"
s3 …Determine the Date by the Day Number in Java
The challenge
What date corresponds to the nth day of the year?
The answer depends on whether the year is a leap year or not.
Write a function that …
Read Article →Correct the time-string in Java
The challenge
- You have to create a method, that corrects a given time string.
- There was a problem in addition, so many of the time strings are …
Shifter Words Challenge in Java
The challenge
You probably know that some characters written on a piece of paper, after turning this sheet 180 degrees, can be read, although …
Read Article →Find Maximum and Minimum Values of a List in Java
The challenge
Make two functions, max and min that take a(n) array/vector of integers list as input and outputs, respectively, the largest and lowest …
Valid Parentheses in Java
The challenge
Write a function that takes a string of parentheses, and determines if the order of the parentheses is valid. The function should return …
Read Article →Boggle Word Checker in Java
The challenge
Write a function that determines whether a string is a valid guess in a Boggle board, as per the rules of Boggle. A Boggle board is a 2D …
Read Article →Build a pile of Cubes in Kotlin
The challenge
Your task is to construct a building which will be a pile of n cubes. The cube at the bottom will have a volume of n^3, the cube above …
Read Article →Which x for that sum in Kotlin
The challenge
Consider the sequence U(n, x) = x + 2x**2 + 3x**3 + .. + nx**n where x is a real number and n a positive integer.
When n goes to …
Reverse the bits in an integer in Java
The challenge
Write a function that reverses the bits in an integer.
For example, the number 417 is 110100001 in binary. Reversing the binary is …
Invert values in Kotlin
The challenge
Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives. …
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