How to UpperCase the start of each Word in a String in Golang
The challenge
The task is to take a string of lower-cased words and convert the sentence to upper-case the first letter/character of each word …
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In-depth guides, insights, and best practices for modern software engineering
How to Solve Max-Min Arrays in Java
The challenge
You are given an array of unique elements, and your task is to rearrange the values so that the first max value is followed by the first …
Read Article →How to Find the Smallest Integer in the Array in Golang
The challenge
Given an array of integers your solution should find the smallest integer.
For example:
- Given
[34, 15, 88, 2]your solution will return …
How to do Basic Encryption in Java
The challenge
The most basic encryption method is to map a char to another char by a certain math rule. Because every char has an ASCII value, we can …
Read Article →Forming Unique Array Combinations in Golang
The challenge
You are given an array of arrays and your task will be to return the number of unique arrays that can be formed by picking exactly one …
Read Article →How to Check if String is a Palindrome in Python
The challenge
Write a function that checks if a given string (case insensitive) is a palindrome.
The solution in Python
Option 1:
def …How to Find the Squares in Java
The challenge
Complete the function that takes an odd integer (0 < n < 1000000) which is the difference between two consecutive perfect squares, …
How to Get Longest Word in Sentence in Java
The challenge
When given a string of space-separated words, return the word with the longest length.
If there are multiple words with the longest …
Read Article →How to Sum all the Integers in a String in Golang
The challenge
Implement a function that calculates the sum of the integers inside a string. For example, in the string …
Read Article →How to Reverse a String in Golang
The challenge
Complete the solution so that it reverses the string passed into it.
'world' => 'dlrow'
'word' => …Maximum Different of Int-Array in Java
The challenge
You must implement a function that returns the difference between the biggest and the smallest value in a list(lst) received as a …
Read Article →Indexed Capitalization in Java
The challenge
Given a string and an array of integers representing indices, capitalize all letters at the given indices.
Example: …
Read Article →How to Spacify a String in Java
The challenge
Modify the spacify function so that it returns the given string with spaces inserted between each character.
spacify("hello …How to Find the Last Digit of a Huge Number in Golang
The challenge
For a given list [x1, x2, x3, ..., xn] compute the last (decimal) digit of x1 ^ (x2 ^ (x3 ^ (... ^ xn))).
Example:
last_digit({3, 4, 2}, …Find the Maximum Length Difference between Lists/Arrays in Python
The challenge
You are given two arrays a1 and a2 of strings. Each string is composed of letters from a to z. Let x be any string in the first array …
How to Circularly Sort an Array in Golang
The challenge
An array is circularly sorted if the elements are sorted in ascending order but displaced, or rotated, by any number of steps.
Complete …
Read Article →Largest Number Groupings in String in Python
The challenge
You are be given a string that has lowercase letters and numbers. Your task is to compare the number groupings and return the largest …
Read Article →How to Alternate String Casing in Golang
The challenge
Write a function toWeirdCase (weirdcase in Ruby) that accepts a string, and returns the same string with all even indexed characters in …
How to Sort a List of Numbers in Python
The challenge
Finish the solution so that it sorts the passed-in array/list of numbers. If the function passes in an empty array/list or null/None …
Read Article →How to Validate Usernames with Regex in Java
The challenge
Write a simple regex to validate a username. Allowed characters are:
- lowercase letters,
- numbers,
- underscore
Length should be between 4 …
Read Article →Sort Lexicographical Order of Substrings in Java
The challenge
Given two arrays of strings a1 and a2 return a sorted array r in lexicographical order of the strings of a1 which are substrings of …
How to Perform Alphabetical Addition in Java
The challenge
Your task is to add up letters to one letter.
The function will be given an array of single-character Strings, each one being a letter …
Read Article →Roman Numerals Decoder in Golang
The challenge
Create a function that takes a Roman numeral as its argument and returns its value as a numeric decimal integer. You don’t need to …
Read Article →How to Subtract from Time in Golang
The challenge
Clock shows h hours, m minutes and s seconds after midnight.
Your task is to write a function that returns the time since midnight in …
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