why are lifecycle hooks important? — because they let you optimize your app: you can free up resources when you no longer need them (when the component is destroyed)

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?

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> ?

Insanity is hereditary; you get it from your children.

It seems like they never say anything bad about actors, they just pump them up.

I don't wear a wig. I'd feel terrible onstage with a wig. I hate to be so 'Actors Studio'-ish, but I like to feel it's me out there.

People think your success is just a matter of having a pretty face. But it's easy to be chewed up and spat out. You've got to stay ahead of the game to be able to stay in it.

Every disappointment gives you opportunity to make another appointment.

I always have a story in my head that needs to be written, or at least I think I do. But I usually can't find the time to write it.

I started writing diaries, and mine were horrible. Oh, the monotony. Oh, the angst. I said, 'I don't want anyone to find these!' I destroyed them.

To eat is a necessity, but to eat intelligently is an art.

The longer khakis are owned and the more they are washed, the softer and more comfortable they become.

The victory of success is half won when one gains the habit of setting goals and achieving them.

When I worked with Jamie Lee Curtis in 'True Lies', she told me, You need a plan B, because when you have six months to a year off, you can go nuts. You need to have another focus.

There's something so familial and intimate between a boxer and his trainer.

I am beginning to have more powerful enemies and more envious ones, too.

I get accused of talking about records. But it's the guys who interview me who ask about them.

I do reinvent old hits of mine and sort of give them a new life.

As a kid, I didn't read a great deal of fiction, and I've forgotten most of what I did read.

Its the flaw that brings out the beauty.

There is an element of mystique to radio, and I often listen to cricket commentary on radio, especially when one is stuck in a traffic jam.

National Geographic has awesome stuff. I like Court TV. Sometimes I'll watch Reality Mix because they have some interesting stuff on that.

I always believed that my silence on several topics will be an advantage in the long run.

Todd Rundgren is a genius, and I don't use that word a lot.