The challenge Given a string str, reverse it omitting all non-alphabetic characters. Examples: For str = “krishan”, the output should be “nahsirk”. For str = “ultr53o?n”, the output should… Read More »How to Reverse Letters in Kotlin
The challenge Get the ASCII value of a character. The solution in Kotlin Option 1: Option 2: Option 3: Test cases to validate our solution
Coroutines are a way to handle multithreading in Kotlin, read more about it from the official docs: https://kotlinlang.org/docs/coroutines-overview.html An example of a Coroutine in Kotlin… Read More »How to use Coroutines in Kotlin
val pair: Pair<String, Int> = “myKey” to 2 What is a Pair Type? A utility class when you want to return 2 values that are… Read More »The Pair Type in Kotlin
There are times when you need to extract an object into a number of variables. Let’s take the example below: In Kotlin, this is known… Read More »Deconstruction in Kotlin
Unit corresponds to the void keyword in Java. What is a Unit in Kotlin? If you have a function that does not return a value,… Read More »What is a Unit in Kotlin?
Functions are reusable pieces of code, often called Blocks, that as the name suggests, act as building blocks to piece together a program. Each language… Read More »How to declare a Function in Kotlin?
Among all the many keywords that Kotlin comes with, there exists val and var. What are they used for? What are the differences, and why… Read More »The differences between Val and Var 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… Read More »Build a pile of Cubes 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… Read More »Which x for that sum in Kotlin
The challenge Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives. The solution in… Read More »Invert values in Kotlin
The challenge A number system with moduli is defined by a vector of k moduli, [m1,m2, ···,mk]. The moduli must be pairwise co-prime, which means that, for… Read More »Moduli number system in Kotlin
The challenge Given an array X of positive integers, its elements are to be transformed by running the following operation on them as many times… Read More »Smallest possible sum in Kotlin
The challenge Given a semi-inclusive interval I = [l, u) (l is in interval I but u is not) l and u being floating numbers (0 <= l < u), an integer n… Read More »Floating-point Approximation in Kotlin
The challenge Create an NxN multiplication table, of size provided in parameter. for example, when given size is 3: for given example, the return value should be: [[1,2,3],[2,4,6],[3,6,9]]… Read More »Multiplication table in Kotlin
The challenge Complete the solution so that it strips all text that follows any of a set of comment markers passed in. Any whitespace at… Read More »Strip Comments in Kotlin
The challenge Consider the sequence S(n, z) = (1 – z)(z + z**2 + z**3 + … + z**n) where z is a complex number and n a positive integer (n… Read More »Experimenting with a sequence of complex numbers in Kotlin
The challenge Let us consider this example (array written in general format): ls = [0, 1, 3, 6, 10] Its following parts: The corresponding sums… Read More »Sums of Parts in Kotlin
The challenge In mathematics, a Diophantine equation is a polynomial equation, usually with two or more unknowns, such that only the integer solutions are sought or studied.… Read More »Diophantine Equation in Kotlin