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> ?

The childhood shows the man as morning shows the day.

The Rockwell magazine cover was more a part of the American reality than a record of it.

Monogamy is a possibility - and a necessity. Kids have got to have something they can rely on. You have got to have something you rely on.

If I can get a sanitized version of reality, I'll take it.

In my opinion, life is more important than show business.

One of the most important things liberals don't understand about conservatism, obscured by too much lazy talk about conservatism's various 'wings,' is that its tenets form a relatively organic base for its adherents, where 'traditional morality' serves the interests of laissez-faire economics and vice-versa.

There are artists or filmmakers or cinematographers who have had long careers who, maybe to reinvent themselves or just to stay in a secure place, layer it on or ham it up, if I can use that expression, or make grand choices that don't feel as authentic as what they did to make us fall in love with them in the first place.

That's the best thing about writing, when you're in that zone, you're porous, ready to absorb the solution.

There is no royal road to a successful life, as there is no royal road to learning. It has got to be hard knocks, morning, noon, and night, and fixity of purpose.

I don't know too much about Bollywood at all, but I've done quite a bit of dancing... and not much singing.

Breastfeeding is an unsentimental metaphor for how love works in a way. You dont decide how much and how deeply to love you respond to the beloved and give with joy exactly as much as they want.

Thinking is more interesting than knowing, but less interesting than looking.

If you're going to do a thing, do it fully so that no writing you give the world misrepresents you - so that nothing you put out there is like a sad regift you couldn't throw away and had to find a place for.

Take risks! I'm embracing bold prints.

There's no pressure for me to go out there and say, I've got to have a top 40 hit because it's not going to happen.

Nothing is more dangerous than a friend without discretion; even a prudent enemy is preferable.

Apple has hundreds of stores around the world that are beautiful, and they have a distribution system and a staff of 40 or 50 people that will help you.

You really can't explain how you do the things you do. I can't, anyway. I love certain actors, but sometimes they say the stupidest things about technique. I don't want to say something stupid.

It is confidence in our bodies minds and spirits that allows us to keep looking for new adventures.

My work is drawn to the political but avoids an agenda. There is no inherent critique or support.

I could not - and I still cannot - see a sustainable career as a filmmaker in which I focus fully on our gay stories.