what are the 2 params passed to a reducer? — the state and the action. you need to initialize the state, for example: function todos(state=[ ], action)

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 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> ?

For those who are able to work, work has to be seen as the best route out of poverty. For work is not just about more money - it is transformative. It's about taking responsibility for yourself and your family.

Bad company ruins good morals.

We will be protected by the great men and women of our military and law enforcement and, most importantly, we are protected by God.

What interested me was not news, but appraisal. What I sought was to grasp the flavor of a man, his texture, his impact, what he stood for, what he believed in, what made him what he was and what color he gave to the fabric of his time.

I am confident and I work so hard to be confident. If I wasn't talented, then I wouldn't be as confident.

No matter how hard the loss defeat might serve as well as victory to shake the soul and let the glory out.

I have registered few titles like 'Bharat Bandh,' 'Calendar Girl,' 'Money Politics.' The titles just intrigued me, so I registered. I had a title, 'Jai Ho,' which I gave to Sohail Khan for his next film with Salman Khan. These are typical Madhur Bhandarkar kind of films. I may make a film or not on such titles... not sure yet.

Hip-hop is still cool at a party. But to me, hip-hop has never been strictly a party; it is also there to elevate consciousness.

We all wear masks, and the time comes when we cannot remove them without removing some of our own skin.

The moment you think you understand a great work of art, it’s dead for you.

I felt that I did have the crowd behind me. That obviously helps a lot.

The greatest story of all is Colonel Sanders. He didn't start until he was sixty-six on a freeway bypass for his chicken shop. Anything is possible!

As Walter Cronkite would say, that's the way it is.

The emotional virus lives and thrives in the gap between expectations and perceived reality.

Through our own hard work and ingenuity, America has spent much of its history as the world's dominant economic power. But our dominance is not pre-ordained - history does not roll along on the wheels of inevitability.

But I don't think of myself as a foreigner or a Frenchman! I just think of myself as a director. Whether I'm French or Australian or whatever, it's really not important.

And I liked pluralist Australia. I got a taste for pluralist Australia. I like, I like Australians and I can't believe that they're going to go to hell because they tell a good dirty joke, you know.

If you want to say it with flowers, a single rose says: 'I'm cheap!'

When somebody has convinced you that you're not worth anything to anybody anymore, and they spend a lot of time doing it, you start believing it yourself.

I really love helping students and helping them empathize with people who lived a really long time ago. That's one of the highlights of working in fiction.

All Iraqis should live under one roof and for one goal.