What is the advantage of a class component over a functional component? — A class component has additional feature. In particular, it lets you manage state and lifecycle.

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 ...

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

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> ?

I don't have many people showing up at my door. Very few people come out. When they do, I get a little suspicious. I live way up on a hill, way, way back in the country.

I'm obsessed about lifting the greatest number of Argentines possible out of poverty as quickly as possible.

I think everybody gets bullied in their own way. Even athletes probably get it from their parents. To a degree everybody gets bullied.

To test a modest man's modesty do not investigate if he ignores applause, find out if he abides criticism.

In cutting government, we cut a huge variety of programs, a lot of which I would have liked to see increase, and a lot of which I'd like to see decreased more.

There is nothing that would upset me more than my dad being bribed by the press. It's like, 'Just let them run it, then. Don't you give them ammunition.'

I think music docs could turn off some people.

Ilene Weiss and I went to Girls High together.

I don't really watch my moves all that often; I mean, really, I don't.

These days, many people are unwilling to see their dog as an animal. Let's face it: they are cute, but they will bite. Not only do I look at dogs as animals, I look at myself as an animal, which explains why, since I got my permit, I drive with my head out the window.

I'm a lager drinker. I'm quite a stupid lager drinker. I do like my lager and mashed potatoes.

If you think nobody cares about you try missing a couple of payments.

The strongest results were in Florida and Texas. In just one year in a Texas charter school, an average student gained 7 percentile points in math and 8 percentile points in reading, while Florida charter schools improved student performance by 6 percentile points.

Don't wish me happiness - I don't expect to be happy it's gotten beyond that, somehow. Wish me courage and strength and a sense of humor - I will need them all.

I think what we do is fairly unique on 'Psych,' and we just have to keep doing that because that's what got us where we are.

Kids think books are cool, especially when they see that people they think books are cool are reading.

My first idol was a Swedish goalie, Peter Lindmark.

I feel a man, when married, becomes more balanced. All the extra-curricular activities are done away with. The focus is on work and family.

Les Pauls work out real well for me because I'll beat the hell out of them and they'll still work. The only trouble with them is finding good ones.

On Friday I was in Washington for a meeting with Administration officials. In the course of that meeting, they requested that I 'step aside' as CEO of GM, and so I have.

After doing some research with my agent, we found out Klipsch was an official Colts partner, and they were based in Indianapolis, which only added to my esteem for the company. I also have a passion for design and technology that developed while I was at Stanford and appreciate the quality of Klipsch's speakers and headphones.