How to Convert BigNumber to Int/Number in Ethers/Web3
If you have a BigNumber when using web3, then you can convert this to a regular Javascript Number using the ethers library as follows: …
Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to Create a Pyramid Array in Javascript
The challenge
Write a function that when given a number >= 0, returns an Array of ascending length subarrays.
pyramid(0) => [ ]
pyramid(1) => …How to Create a Reverse Polish Notation Calculator in Javascript
The challenge
Your job is to create a calculator which evaluates expressions in Reverse Polish notation.
For example expression 5 1 2 + 4 * + 3 - …
How to declare a global variable in React?
If you need to declare a global variable in React, then you can do the following:
Create a file called config.js
module.exports = global.config = { …How to Find the Missing Term in an Arithmetic Progression in Javascript
The challenge
An Arithmetic Progression is defined as one in which there is a constant difference between the consecutive terms of a given series of …
Read Article →How to Count Characters in a Javascript String
The challenge
The main idea is to count all the occurring characters in a string. If you have a string like aba, then the result should be {'a': 2, …
How to Increment/Decrement a value in React/NextJS
Use the following code block to get started:
function GetCount() {
const [count, setCount] = useState(1);
const incrementCounter = () => { …How to disable text selection highlighting in CSS
If you would like to disable the text selection highlighting that is enabled by default on all browsers, then you can do this:
user-select: none;
If …
Read Article →Irreducible Sum of Rationals in Golang
The challenge
You will have a list of rationals in the form:
lst = [ [numer_1, denom_1] , ... , [numer_n, denom_n] ]
where all numbers are positive …
Read Article →How to copy S3 objects between AWS accounts
In your source account create a customer-managed policy:
{
"Version": "2012-10-17",
"Statement": [
{ …How to find all symlinks in a directory tree on Mac
If you need to recursively find all symbolic links in a directory tree on a Mac, then you have a couple of options.
You could be trying to find them …
Read Article →How to Install App Mesh on AWS EKS
You can follow the steps below to install App Mesh on AWS EKS (Kubernetes).
Step 1 – Prerequisites
curl -o pre_upgrade_check.sh …