Simon Van Casteren FrigoEU

Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

	// install @types/react-redux and other nonsense

	import * as React from 'react'
	import { connect } from 'react-redux'
	import { YourActualAppState } from './wherever-it-is.ts'

	export function mapStateToProps({
	whatever
	}: YourActualAppState) {
	return {