How do you render an element into the dom? — you pass both element and root DOM node to ReactDom.render() ReactDOM.render(element, document.getElementById('root'))

why JSX?

can you have more than one root dom nodes?

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

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 love France. France is a nice place.

My first day of high school, I wore brown boys' corduroys that my mom had sewn Sesame Street elastic into - they were my coolest pants - and a lime green Patagonia fleece that my mom found at Goodwill. I loved fleece.

When I broke in, in 1957, it was wide open. Now you're up against strong competition.

Magical realism is a blending of the unusual or supernatural into an otherwise ordinary setting. And, to me, this perfectly describes the South. 'The Sugar Queen' involves a lot of magical happenings, but in a very down-home Southern setting. It's full of things that could almost be true.

I don't know if I have a 'Greatest Album Ever.' I really liked 'The Blueprint' by Jay-Z. The production on that album was really great. 'All I Need' was the first song I used for walk-on music in 2002 for my second time ever on stage, so that means a lot to me.

I dabbled a little bit in the whole music thing but I've always thought about Bernie Taupin, who is Elton John's lyricist; Elton John is the great melody and song writer but Bernie Taupin is the one who writes all the lyrics. I don't write lyrics, and I never wanted to be in the music business if I was just going to be a puppet in it.

From the industry's point of view, the problem is not that coal companies blast the top off mountains, turning the area into a moonscape and polluting the air and releasing toxic chemical into what's left of the local streams and aquifers. It's that the people who live near the mines are too cozy with their cousins.

Take the first step in faith. You don't have to see the whole staircase. Just take the first step.

I am deeply immersed in my medical work, and it can get very intense, but I believe that the connection and devotion is key. You can not work on diseases as devastating and deadly as Lassa and Ebola without complete trust and respect for the individuals with whom you work. My lab and colleagues are just extraordinary, and we are a family.

I used to have a lot of superstitions, and then I realized that it was kind of hogwash. Once I let go of them, I relaxed a lot.

One thing my mother had a nose for was inauthenticity.

A verbal contract isn't worth the paper it is written on.

You know, you don't need a leader to sort of administer something that's going very well. In fact, in one sense, an overly ambitious person in that circumstance can probably screw it up.

'The Tiger And The Snow' is a beautiful movie. I am in love with this idea.

C Kalyan has been amazing and totally committed as a producer.

I wouldn't compare myself to any past Idol contestant, because I don't feel like I am like any of them. Maybe stories are cool but my story is different from most people's story. I don't like to compare myself to other people, I like to just be me.

People like to trace their ancestry.

Most of us spend too much time on the last twenty-four hours and too little on the last six thousand years.

When it comes to turning out movies, I'm for Hollywood.

Don't be afraid of being scared. To be afraid is a sign of common sense. Only complete idiots are not afraid of anything.

Exams test your memory life tests your learning others will test your patience.