XIII q13

Dependency Injection in Functional Programming

There exist several DI frameworks / libraries in the Scala ecosystem. But the more functional code you write the more you'll realize there's no need to use any of them.

A few of the most claimed benefits are the following:

Dependency Injection.
Life cycle management.
Dependency graph rewriting.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	import { useCount, useIncrement, useDecrement } from './store.Count'

	export default function Counter () {
	const count = useCount()
	const increment = useIncrement()
	const decrement = useDecrement()

	return (
	<div>
	<div>Count: {count}</div>

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport"
	content="user-scalable=no, width=device-width, initial-scale=1, maximum-scale=1">
	<title>Pinch Zoom</title>
	</head>

	<body>

	#!/bin/bash

	if [ $(id -u) != "0" ]; then
	printf "Error: You must be root to run this tool!\n"
	exit 1
	fi
	clear
	printf "
	####################################################
	# #

	/*
	* This work is free. You can redistribute it and/or modify it under the
	* terms of the Do What The Fuck You Want To Public License, Version 2,
	* as published by Sam Hocevar. See the COPYING file for more details.
	*/
	/*
	* Easing Functions - inspired from http://gizma.com/easing/
	* only considering the t value for the range [0, 1] => [0, 1]
	*/
	EasingFunctions = {