How to check if a map contains a key in Go
If you have a map in Go and want to only perform an action if it contains a certain key, then you can do so… Read More »How to check if a map contains a key in Go
How to Remove all Vowels from a String in Java
The challenge Remove all vowels from the string. Vowels: The solution in Java code Option 1: Option 2: Option 3: Test cases to validate our… Read More »How to Remove all Vowels from a String in Java
How to Loop Forever in Golang
If you need to loop forever, or infinitely, in your Go code, then you have 2 options: Option 1: Option 2: Just remember that you… Read More »How to Loop Forever in Golang
Understanding For Loops in Golang
In Golang a for loop is a way to loop through an iterable. The most basic For Loop A classic For Loop For Loop without… Read More »Understanding For Loops in Golang
[Solved] go mod init: modules disabled by GO111MODULE=off
You’ve probably just tried to initialise a new Go module, and received the following error: go mod init: modules disabled by GO111MODULE=off; see ‘go help… Read More »[Solved] go mod init: modules disabled by GO111MODULE=off
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 Example:… Read More »How to UpperCase the start of each Word in a String in Golang
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… Read More »How to Solve Max-Min Arrays in Java
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 2 Given [34, -345,… Read More »How to Find the Smallest Integer in the Array in Golang
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… Read More »How to do Basic Encryption in Java
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… Read More »Forming Unique Array Combinations in Golang
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: Option 2: Option 3:… Read More »How to Check if String is a Palindrome in Python
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, and… Read More »How to Find the Squares in Java
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 length,… Read More »How to Get Longest Word in Sentence in Java
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 “The30quick20brown10f0x1203jumps914ov3r1349the102l4zy dog”, the sum of the… Read More »How to Sum all the Integers in a String in Golang
How to Reverse a String in Golang
The challenge Complete the solution so that it reverses the string passed into it. The solution in Golang Option 1: Option 2: Option 3: Test… Read More »How to Reverse a String in Golang
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 parameter.… Read More »Maximum Different of Int-Array in Java
Indexed Capitalization in Java
The challenge Given a string and an array of integers representing indices, capitalize all letters at the given indices. Example: capitalize(“abcdef”,[1,2,5]) = “aBCdeF” capitalize(“abcdef”,[1,2,5,100]) =… Read More »Indexed Capitalization in Java
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. The solution in Java code Option… Read More »How to Spacify a String in Java
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: because 3… Read More »How to Find the Last Digit of a Huge Number in Golang
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 and y be any string… Read More »Find the Maximum Length Difference between Lists/Arrays in Python
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 the function/method… Read More »How to Circularly Sort an Array in Golang
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… Read More »Largest Number Groupings in String in Python
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 each word uppercased, and… Read More »How to Alternate String Casing in Golang
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 value… Read More »How to Sort a List of Numbers in Python
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 and 16 characters… Read More »How to Validate Usernames with Regex in Java