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Everyone wants to have state management in an application. But what problem does it solve for us? Most people start with a small application and already introduce a state management library. Everyone is speaking about it, aren't they? But most applications don't need ambitious state management from the beginning. It is even more dangerous, because most people are never going to experience which problems libraries like Redux or MobX solve.

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I am doing React + Redux for quite some time now. My learnings are subjective, but I thought they may help people to learn or advance in React + Redux. Redux is not strictly coupled to React, but it happens to be that a lot of people are using both libraries in combination. The article is opinionated, maybe it doesn't match every time your thoughts, but I hope to get feedback on it to improve myself as well.

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In a rapid development environment it happens quite often: There is no time to plan state structure ahead. There is no time to refactor in favour of abstractions. There is no place to refactor, because you have multiple teams working on feature folders, where every team is relieved to have their owned place. Redux state keys solve that problem. They enable a dynamically allocated yet predictable substate.

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The tutorial will show you how to use Observables in Redux. Moreover it will give you an entry point into Reactive Programming. Keep in mind that it will only scratch the surface, but maybe afterwards you get the idea and want to give it a shot in some of your projects as well.

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The MobX React: Refactor your application from Redux to MobX tutorial will teach you how to use MobX instead of Redux for state management in React. We will come from a Redux + React seed project and refactor it from Redux to MobX. While we do so, I will explain in detail the concepts behind MobX and the similarities and differences compared to Redux.

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The Normalizr in Redux tutorial will teach you how to use normalizr for an improved data management in your Redux store. The library itself will help you to avoid deep nested data structures although the returned data from a server is deeply nested. Additionally it comes for free to enable a manageable single source of truth for data entities in your global store.

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The Redux Ducks: Restructure your Redux App with Ducks tutorial will teach you how to bundle action creators, action types and reducers side by side in your Redux app. Usually in the beginning of learning Redux you have a technical separation of concerns which gets reflected in the folder structure. Basically there is one folder for your actions and one folder for your reducers. Additionally you collect all action types at one place that they can be reused by reducers and actions.

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The Flow: Type Checking with Flow in React + Redux tutorial will teach you how to use Flow in a React + Redux environment. Since JavaScript itself is a dynamically typed language, you will end up with several bugs in your JavaScript career, which could have been prevented due type safety. In terms of using Flow for type safety, it only needs a simple setup to get the advantage of a more robust application.

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At the end of this tutorial you can expect to have a running React + Redux app, which consumes the SoundCloud API. You will be able to login with your SoundCloud account, list your latest tracks and listen to them within the browser. Additionally you will learn a lot about tooling with Webpack and Babel.

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