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 strings of a2. Example 1: a1 =… Read More »Sort Lexicographical Order of Substrings 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… Read More »How to Perform Alphabetical Addition in Java
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… Read More »Roman Numerals Decoder 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 milliseconds. Example: Input constraints:… Read More »How to Subtract from Time in Golang
The challenge You want to create secret messages which must be deciphered. Here are the conditions: Your message is a string containing space separated words.… Read More »How to Encrypt Words in Java
The challenge Write a function that takes an integer as input, and returns the number of bits that are equal to one in the binary… Read More »Bit Counting in Golang
The challenge Find the next higher number (int) with same ‘1’- Bits. I.e. as much 1 bits as before and output next higher than input. Input is… Read More »How to Find Next Higher Number with Same Bits in Golang
The challenge Write a function named first_non_repeating_letter that takes a string input, and returns the first character that is not repeated anywhere in the string. For example,… Read More »How to Find the First Non-Repeating Character in Golang
The challenge Return the last digit of the nth element in the Fibonacci sequence (starting with 1,1, to be extra clear, not with 0,1 or… Read More »How to Find the Last Fibonacci Digit in Golang
The challenge Write an algorithm that will identify valid IPv4 addresses in dot-decimal format. IPs should be considered valid if they consist of four octets,… Read More »How to Validate an IP Address in Golang
The challenge In this challenge, you have to write a method that folds a given array of integers by the middle x-times. An example says… Read More »How to Fold an Array in Java
Fmt provides printing to standard output (usually the console) and formatting of strings capabilities. The basics of Print and Println The main difference between fmt.Print… Read More »Formatting Strings with Fmt in Golang
The challenge Given a list lst and a number N, create a new list that contains each number of lst at most N times without… Read More »Delete Occurrences of an Element if it occurs more than N times in Java
Reading from “standard input” is really useful if you are making a command-line application and require user input. First setup a new bufio reader, then… Read More »How to Read from Standard Input in Golang
If you need to install Golang on WSL under Windows 10 or higher, you can follow these few steps. First remove any old versions lying… Read More »How to Install Golang on WSL/WSL2
The challenge Write a function that accepts a string, and returns true if it is in the form of a phone number.Assume that any integer… Read More »How to Validate Phone Numbers in Java
The challenge Sort elements in an array by decreasing frequency of elements. If two elements have the same frequency, sort them by increasing value. The… Read More »How to Sort Array by Frequency in Java
The challenge Write a function that receives two strings and returns n, where n is equal to the number of characters we should shift the… Read More »How to Calculate String Rotation in Java
The challenge Compare two strings by comparing the sum of their values (ASCII character code). For comparing treat all letters as UpperCase null should be treated… Read More »Compare Strings by Sum of Chars in Java
The challenge Given two integers a, b, find The sum of them, BUT You are not allowed to use the operators + and – Notes The numbers (a,b) may be positive… Read More »How to Add Two Integers Without Arithmetic Operator in Java
The challenge Count how many arguments a method is called with. Examples The solution in Java code Some languages refer to this as the spread… Read More »Counting Method VarArgs in Java
The challenge You are given a list/array which contains only integers (positive and negative). Your job is to sum only the numbers that are the… Read More »How to Sum Consecutives in Java
The challenge You are given a string. You must replace any occurrence of the sequence coverage by covfefe, however, if you don’t find the word coverage in the string, you… Read More »Replacing Occurences of Words in Java
The challenge Your task is to write a function toLeetSpeak that converts a regular english sentence to Leetspeak. More about LeetSpeak You can read at wiki -> https://en.wikipedia.org/wiki/Leet… Read More »Convert String to LeetSpeak in Java
The challenge Count the number of occurrences of each character and return it as a list of tuples in order of appearance. For empty output… Read More »Ordered Count of Characters in Python