Check if a String is Uppercase in Golang
The challenge Create a method IsUpperCase to see whether the string is ALL CAPS. For example: In this challenge, a string is said to be in ALL… Read More »Check if a String is Uppercase in Golang
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… Read More »How to UpperCase a String in Golang
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… Read More »Return the Shortest Words in Golang
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 two numbers directly above it… Read More »How to Solve Pascal’s Triangle in Python
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 (string) for number… Read More »Creating a Multiplication Table for a Number in Golang
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. The solution in Golang Option 1: Option 2: Option 3:… Read More »How to Remove Duplicates in an Array in Golang
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 More »How to Dry Potatoes in Golang
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… Read More »How to Reverse or Rotate in Golang
How to use Coroutines in Kotlin
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
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… Read More »The Pair Type in Kotlin
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.… Read More »Get which Quarter of the Year in Golang
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… Read More »How to Sum The Strings in Python
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 getRowNodeId() callback… Read More »Fixing: ImmutableService requires getRowNodeId() callback to be implemented, your row data need IDs
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… Read More »How to Undo the most recent local commits in Git
Deconstruction 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
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 to… Read More »Playing with passphrases in Python
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,… Read More »What is a Unit in Kotlin?
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 language… Read More »How to declare a Function in Kotlin?
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… Read More »The differences between Val and Var in Kotlin
Automatically Resize All Columns to Fit in Ag-Grid
If you have an Ag-Grid, and want to automatically resize all the columns to fit the width of the viewport, you can use this hack.… Read More »Automatically Resize All Columns to Fit in Ag-Grid
How to Get All Rows in Ag-Grid
The easiest way to get the content of all rows’ data, back into a Javascript/Typescript array, is as follows. Simply create a blank array, then… Read More »How to Get All Rows in Ag-Grid
Find the Max Area of an Island in Python
The challenge You are given an m x n binary matrix grid. An island is a group of 1‘s (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four… Read More »Find the Max Area of an Island in Python
Using Apache POI to Get or Create a Sheet in Excel using Java
Apache POI provides a mechanism to work with Excel documents. However, it has a missing feature when you want to only create a new sheet… Read More »Using Apache POI to Get or Create a Sheet in Excel using Java
A Simplistic TCP Finite State Machine (FSM) in Python
The challenge Automatons, or Finite State Machines (FSM), are extremely useful to programmers when it comes to software design. You will be given a simplistic… Read More »A Simplistic TCP Finite State Machine (FSM) in Python
How to Resolve Scaling Squared Strings in Java
The challenge You are given a string of n lines, each substring being n characters long. For example: s = “abcd\nefgh\nijkl\nmnop” We will study the “horizontal” and the “vertical” scaling of… Read More »How to Resolve Scaling Squared Strings in Java