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

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)

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 })

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

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> ?

A female vocal can lift a song.

I love shopping! It's my release sometimes.

Love is a lot like a backache it doesnt show up on X rays but you know its there.

I'm not very good at picking stuff up off the radio. It takes me way too long to learn other people's music.

I love portobello mushrooms. I often say that if I were vegetarian, I would live off of these. Now, it would never happen, but it's still nice to know that they exist. So meaty, so flavorful.

If you want to find somebody and you want to be married and you want to have children, don't make it a rock star.

Any time a writer thinks he has all the answers to how someone should talk or react or end a scene, it's a spontaneity-killer.

I love the theatre and theatre people.

Health is the thing that makes you feel that now is the best time of the year.

I think everything that you do, you're learning. I mean, every movie that you make is like a film school; that's one of the things that I enjoy about filmmaking.

I've always been kind of a shy guy. Not very outgoing. I might not start a conversation, but if somebody else does, I'll chat away.

Aren't we all striving to be overpaid for what we do?

'House of Balloons' was special because I had no deadlines, and nobody knew me, so there were no expectations. Spent a year making it perfect. Every song had at least, like, 7 different versions to them before picking the right one.

My music, certainly, has never embarrassed me.

If there's no inner peace, people can't give it to you. The husband can't give it to you. Your children can't give it to you. You have to give it to you.

In my room as a kid... I'd play a fighter and get knocked to the floor and come back to win.

These young guys are playing checkers. I'm out there playing chess.

I don't know a high C from a low C.

Inflation is lower and more stable and the real business cycle fluctuations are more modest.

If you want to know how I feel, I'll summarize it in one word - terrible.

I don't give the devil credit for creating nothing.