Recently I’ve come across a task to design a recommendation feed for an article collection web app. The app helps user collect article snippets and allows users to like certain snippets from other users that appear in the feed.

A newsfeed… Sounds familar? This design pattern is actually seen in social networks like Facebook or Twitter. Why don’t we take a look at how these recommendation algorithms work, and then devise our own?

Facebook’s Algorithm

In Facebook, the newsfeed would show the most recommended posts based on inventory, signals and predictions (https://tinuiti.com/blog/paid-social/facebook-algorithm/).

• The Inventory of all posts available to display.
• Signals that…

One of the first tutorials you come across when learning a new programming language is to build a Todo App. While some think it is reinventing the wheel to build one, one can get a grasp of how the framework/libraries work.

Here is the final working product: https://wavelet-todo.surge.sh in case you are in a rush :)

This tutorial adds a bit of twist to the normal Todo App by making it decentralized on the Wavelet blockchain, as a decentralized app (Dapp).

Why?

Why, you might ask, do I have to build a Dapp and store data on the blockchain, when I…