Ex with a combineReducers() function todos(state = [], action) { // Somehow calculate it... return nextState } ​ function visibleTodoFilter(state = 'SHOW_ALL', action) { // Somehow calculate it... return nextState } ​ let todoApp = combineReducers({ todos, visibleTodoFilter })

why JSX?

can you have more than one root dom nodes?

How do you render an element into the dom?

Are React elements mutable?

There are two ways of defining a component: as a function and as a ...

What is the advantage of a class component over a functional component?

How do you add local state to a class?

why are lifecycle hooks important?

Does redux work only with react?

Core concepts: actions reducers

what's an action for redux?

What's the purpose of a reducer?

what are the 2 params passed to a reducer?

what are the advantages of a single store?

How is Redux different from Flux?

advantage of immutability in Redux?

Redux architecture revolves around a strict unidirectional data flow.

Data lifecycle: 1. You call store.dispatch(action) 2. Redux store calls the reducer function 3. combine output of multiple reducer into on single state tree 4. Redux store returns the complete state tree (returned by the root reducer)

React bindings for Redux embrace the idea of separating presentational and container components.

Container Components: How things work (data fetching, state updates) Dispatch Redux actions Are usually generated by React Redux

Presentational Components How things look (markup, styles) Invoke callbacks from props to change data Are written by hand

You could write a container component by hand, but we suggest instead generating container components with the React Redux library's connect() function, which provides many useful optimizations to prevent unnecessary re-renders.

To use connect(), you need to define a special function called mapStateToProps that tells how to transform the current Redux store state into the props you want to pass to a presentational component you are wrapping.

In addition to reading the state, container components can dispatch actions. In a similar fashion, you can define a function called mapDispatchToProps() that receives the dispatch() method and returns callback props that you want to inject into the presentational component.

Connecting react and redux: import { connect } from 'react-redux' ​ const VisibleTodoList = connect( mapStateToProps, mapDispatchToProps )(TodoList) ​ export default VisibleTodoList

Redux component <Provider> : is used to magically make the store available to all container components in the application without passing it explicitly. You only need to use it once when you render the root component:

How do you use <provider> ?

If you can quit quit. If you cant quit stop complaining this is what you chose.

It is always sad when someone leaves home, unless they are simply going around the corner and will return in a few minutes with ice-cream sandwiches.

I was raised in the environment where it really wasn't about sittin' around dreaming all the time, it was about practicing and workin' really hard and if a dream ever came to you, you'd be prepared for that opportunity.

I like to create.

A love for humanity came over me, and watered and fertilised the fields of my inner world which had been lying fallow, and this love of humanity vented itself in a vast compassion.

Everybody got it wrong. I said I was into porn again, not born again.

What I remember most about the 'Road' movies is my enjoyment at watching the two characters sparring with each other. But more important than that was my feeling that Hope and Crosby were enjoying the sparring, too.

'All-Star Wonder Woman' would get worked on in what is laughably referred to as my 'spare time.' I just ended up with less and less time to devote to it. Eventually, we all realized that it was taking forever, so we just all agreed to hold off on it 'til the time was right to do it properly. Well, I still have a contract; DC never tore it up.

Clothing creates the illusion that bodies fit an aesthetically pleasing norm. And that illusion depends on getting the fit right. Garments that bunch, pull, or sag call attention to figure flaws and often make people look worse than they would without clothes.

Love is never supposed to hurt. Love is supposed to heal, to be your haven from misery, to make living worthwhile.

Total war is no longer war waged by all members of one national community against all those of another. It is total... because it may well involve the whole world.

I just can't wait to continue creating music.

Moderation has been called a virtue to limit the ambition of great men, and to console undistinguished people for their want of fortune and their lack of merit.

I'm not saying that all politicians are awful. I don't know any of them well enough to say whether they're awful or not. But almost every day, you find out something about them that's appalling. Maybe we shouldn't be surprised any longer.

Plant your own garden and decorate your own soul instead of waiting for someone to bring you flowers.

I never actually had a guitar lesson. I taught myself the guitar from piano exercise books, which led me to have a pretty good technique on the guitar and allowed me to find different ways to do things.

What can we gain by sailing to the moon if we are not able to cross the abyss that separates us from ourselves? This is the most important of all voyages of discovery, and without it, all the rest are not only useless, but disastrous.

The high destiny of the individual is to serve rather than to rule.

In truth, people can generally make time for what they choose to do; it is not really the time but the will that is lacking.

I learned not to depend on other people. I needed support, but it's you who has to go out and deliver.

What saddens me is the corruption of youth and beauty, and the loss of soul, which is only replaced by money.