Conditionals in TypeScript, also introduced in the TypeScript handbook, allow us to deterministically define types depending on what parameterised types consist of. The general basic rule is:
type ConditionalType = T extends U ? X : Y
T extends some type
U, then assign
X, otherwise assign
extends keyword is at the heart of conditionals whereby we are checking if every value of
T can be assigned to a value of
T is assignable to
U, then the “true type” will be returned —
X is our case. …
This article, along with others surrounding it, will introduce the reader to advanced TypeScript concepts by explaining them from the ground up with a typical use case — working with objects and subsets of those objects in a dynamic way such that we do not know the exact structure of these objects, but want to define them without compromise.
Being able to…
This piece introduces
redux-persist, a package that automates the process of persisting state from your Redux store to local device storage, such as
AsyncStorage in the case of React Native.
redux-persist also repopulates your Redux store on subsequent app launches, otherwise known as rehydration. These useful utilities minimise the work needed to persist data on-device, such as authentication tokens and account settings.
This article introduces the
expo-av package, a universal audio (playing and recording) and video module for React Native projects. The package is maintained by Expo, the go-to library for bootstrapping React Native projects targeting a range of platforms.
Audio packages have come and gone in the React Native ecosystem, most of which either do not work or have not been updated for a significant amount of time. When looking at packages to adopt — especially for critical tasks like audio playback — a reliable and well maintained package is needed. Major iOS updates are launched on a yearly basis and…
This article introduces the feed-forward neural network, its underlying structure and how a “forward pass” (generating an output from input data) is performed within it. This article acts as an introduction to neural networks for those who have not endeavoured into them before, and provides a foundational understanding by which all other neural networks are built upon.
A feed-forward neural network is the most basic type of Artificial Neural Network (ANN). They consist of an input layer, 1 or more hidden layers, and an output layer. Each layer consists of neurons, and neurons also have their own structure. We will…
Matrices are a fundamental concept in AI, especially when working with neural networks and the majority of sub-fields of machine learning, such as image processing and synthesising, natural language processing, prediction — just about all types of deep learning models rely on matrices to contain and manipulate numerical collections of data.
Matrices are multi-dimensional arrays of numbers. They, and neural networks in general, are often referred to as “black boxes”, as they are notoriously hard to analyse for patterns or effectiveness.
Matrices can be very large and can exist in a multitude of dimensions, typically ranging in the thousands if…
Lottie is a library originally created by AirBnB to allow After Effects animations be exported as JSON objects, and played natively on mobile platforms and the web. Lottie for React Native is particularly popular right now with over 100,000 weekly downloads at the time of writing, and this is for good reason — the library allows developers to use industry standard tools that create complex animations that can look extremely impressive running natively on a mobile device.
The terms decentralised finance and yield farming have been aggressively thrown around social media and the Cryptocurrency press as of late in an attempt to capitalise on the buzz and interest of the community. These terms encompass a range of protocols that have launched on the Ethereum mainnet, in the form of smart contracts, that allow token holders to take part in various activities in an attempt to generate more tokens and increase their holdings. One can think of these smart contracts as financial instruments that token holders can take part in, and generate rewards in return.
Material UI is currently the most popular UI framework for React, with the library providing a range of ready-to-use components out of the box. The library consists of components for layout, navigation, input, feedback and more. Material UI is based on Material Design, a design language that Google fore-fronted originally but is now widely adopted throughout the front-end developer community.
Material Design was originally announced in 2014 and built upon the previous card-based design of Google Now. …
This piece explores the development and management of TypeScript-based NPM packages for React Native. It will cover how to configure TypeScript linting and tsconfig for a package to ensure code integrity with useful VS Code extensions and settings to aid in TypeScript development.
An entire section will be dedicated to TypeScript specific development of a package, in addition to visiting a demo packages project that is available on GitHub. But there are other important aspects of developing NPM packages worth considering. …