Technical Articles

My smallest code interpreter in Java

January 24, 2021 #Java

The challenge

Inspired from real-world Brainf**k, we want to create an interpreter of that language which will support the following instructions: …

Pick peaks in Java

January 23, 2021 #Java

The challenge

Write a function that returns the positions and the values of the “peaks” (or local maxima) of a numeric array.

For example, …

Number of trailing zeros of N in Java

January 22, 2021 #Java

The challenge

Write a program that will calculate the number of trailing zeros in a factorial of a given number.

N! = 1 * 2 * 3 * ... * N

Be careful …

Alphabetic Anagrams in Java

January 21, 2021 #Java

The challenge

Consider a “word” as any sequence of capital letters A-Z (not limited to just “dictionary words”). For any word …

Remove file from Git without deleting locally

January 20, 2021 #Java

If you find yourself in a position where you have already committed some files to git, and they are in the remote repository already, but you want to …

Recover a secret string from random triplets in Java

January 19, 2021 #Java

The challenge

There is a secret string which is unknown to you. Given a collection of random triplets from the string, recover the original string.

A …

Range Extraction in Java

January 18, 2021 #Java

The challenge

A format for expressing an ordered list of integers is to use a comma separated list of either

• individual integers
• or a range of …

Reversed Words in Java

January 17, 2021 #Java

The challenge

Complete the solution so that it reverses all of the words within the string passed in.

Example:

ReverseWords.reverseWords("The …

CamelCase Method in Java

January 16, 2021 #Java

The challenge

Write a simple CamelCase method for strings.

All words must have their first letter capitalized without spaces.

Example:

// …

Even or Odd in Java

January 15, 2021 #Java

The challenge

Create a function that takes an integer as an argument and returns “Even” for even numbers or “Odd” for odd …

Square Every Digit in Java

January 14, 2021 #Java

The challenge

You need to square every digit of a number and concatenate them.

For example, if we run 9119 through the function, 811181 will come out, …

Simple number sequence in Java

January 13, 2021 #Java

The challenge

You are given a string of numbers in sequence and your task will be to return the missing number. If there is no number missing or there …