Gauss summation is essentially an easier way of adding linear numbers in a list without having to iterate over every element. I came across it while reading the impostor’s handbook and wanted to write a quick post about how much more efficient it is. The formula essentially is this: (largest_number…

I can be a bit scatterbrained sometimes, and I wanted an easy way to jog my memory about events in the day, so I made a quick and dirty thing that sends me a text message (SMS) with the events for the day. The code To jump straight into the code: https://github.com/nkhil/gcal Architecture …

A guide on RSA Encryption in Node.js with code samples. — Node.js comes with a ‘crypto’ module that helps you create public and private key pairs to use public-key cryptography. Public key cryptography explained: This is a great article I came across that explains it well: RSA Encryption, Decryption and Signing in Node.js (Javascript) - With Examples This post will explain the RSA algorithm, and how we can implement RSA Encryption, Decryption and Signing in Node.js…www.sohamkamani.com

To normalise a string with extra spaces, for eg: The quick brown fox jumps over the lazy dog To take out extra spaces, here’s the regex you can use: const myString = 'The quick brown fox jumps over the lazy dog' normalisedString = myString.replace(/(\s)\s+/g, '$1') Parenthesis in REGEX are used…

I had this use case of creating a private RSA key that is used only when the tests are run. Since the key doesn’t actually need to be valid (as I use mocks)— I use the following approach. It also helps me not commit a random key to source control. …

I wanted to document something I had to do recently, which was to encrypt a password using a public key before sending it over the network. Here’s a quick example: const credentials = { clientId: 'client01', password: 'foo', } Let’s say we need to encrypt the password using a 3rd…

If you’re instantiating a new Map data structure const myMap = new Map() and you want to ensure that every key in this object belongs to a certain type where the key will always be a string (as a Map allows you to set other types as the key as…

I’m documenting this since I ran into a couple of snags while trying to convert an open SSH key (that doesn’t play well with Node) into an RSA PKCS1 format in the command line. See this Stack Overflow post for more information and suggestions The snippets below assume your private…

I built a tool that lets me look up definitions for HTTP status codes offline and straight from within the command line. I want to give full credit to https://httpstatuses.com/ for a thoroughly useful resource made available without ads. Setup Install the npm module globally npm install -g stts You should…