How to Replace Characters with Alphabet Positions in Python
The challenge
Given a string, replace every letter with its position in the alphabet.
If anything in the text isn’t a letter, ignore it and …
Read Article →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
Returning Highest and Lowest in Python
The challenge
You are given a string of space-separated numbers and have to return the highest and lowest number.
Example:
high_and_low("1 2 3 4 …How to Subtract Arrays in Python
The challenge
Implement a difference function, which subtracts one list from another and returns the result.
It should remove all values from list a, …
How to Detect if Numbers are in Order in Golang
The challenge
In this challenge, your function receives an array of integers as input. Your task is to determine whether the numbers are in ascending …
Read Article →Alternate Capitalization in Golang
The challenge
Given a string, capitalize the letters that occupy even indexes and odd indexes separately, and return as shown below. Index `` will be …
Read Article →Check if a String is Uppercase in Golang
The challenge
Create a method IsUpperCase to see whether the string is ALL CAPS. For example:
type MyString string
MyString("c").IsUpperCase() …How to UpperCase a String in Golang
In Go, there are multiple ways to make a string UpperCase, each of them are by using the strings package.
Option 1 (strings.ToUpper):
func ToUpper(str …
Return the Shortest Words in Golang
The challenge
Given a string of words, return the length of the shortest word(s).
The input string will never be empty and you do not need to account …
Read Article →How to Solve Pascal’s Triangle in Python
The challenge
Given an integer numRows, return the first numRows of Pascal’s triangle.
In Pascal’s triangle, each number is the sum of the …
Read Article →Creating a Multiplication Table for a Number in Golang
The challenge
Your goal is to return multiplication table for number that is always an integer from 1 to 10.
For example, a multiplication table …
Read Article →How to Remove Duplicates in an Array in Golang
The challenge
Remove the left-most duplicates from a list of integers and return the result.
// Remove the 3's at indices 0 and 3
// followed by …How to Dry Potatoes in Golang
The challenge
All we eat is water and dry matter.
John bought potatoes: their weight is 100 kilograms. Potatoes contain water and dry matter.
The …
Read Article →How to Reverse or Rotate in Golang
The challenge
The input is a string str of digits. Cut the string into chunks (a chunk here is a substring of the initial string) of size sz (ignore …
How to use Coroutines in Kotlin
Coroutines are a way to handle multithreading in Kotlin, read more about it from the official docs: …
Read Article →The Pair Type 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 not related …
Read Article →Get which Quarter of the Year in Golang
The challenge
Given a month as an integer from 1 to 12, return to which quarter of the year it belongs as an integer number.
For example: month 2 …
Read Article →How to Sum The Strings in Python
The challenge
Create a function that takes 2 nonnegative integers in form of a string as an input, and outputs the sum (also as a string):
Example: ( …
Read Article →Fixing: ImmutableService requires getRowNodeId() callback to be implemented, your row data need IDs
If you have gotten this error before, then you have been trying to implement a rowData mapping onto Ag-Grid.. and failed!
ImmutableService requires …
How to Undo the most recent local commits in Git
If you have accidentally committed the wrong files into Git, but haven’t yet pushed it to the server, you can recover, or undo your commit as …
Read Article →Deconstruction in Kotlin
There are times when you need to extract an object into a number of variables.
Let’s take the example below:
val (id, name, position, …Playing with passphrases in Python
The challenge
Everyone knows passphrases. One can choose passphrases from poems, songs, movies names and so on but frequently they can be guessed due …
Read Article →What is a Unit 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, you can return a Unit …
How to declare a Function 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 …
Read Article →The differences between Val and Var 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 would you use …