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.

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 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

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> ?

My gut feelings and my faith tell me that until God shuts a door, no human can shut it.

'Lost' was a phenomenon, like Elvis.

What distinguishes modern art from the art of other ages is criticism.

A friendship like love is warm; a love like friendship is steady.

The money was going to come and go, between a wife and the IRS. The thrill of beating the best field in golf is what will always stay with me.

Make no mistake about it. These are not 'kookie' birds. Right now the greatest player, the big tent on the political scene in America, is called the Tea Party movement.

Encouragement of higher education for our youth is critical to the success of our collective future.

America must be the teacher of democracy, not the advertiser of the consumer society. It is unrealistic for the rest of the world to reach the American living standard.

I’ve learned that something constructive comes from every defeat.

Its a coincidence of ideal conditions.

I've pretty much accepted the fact that you're going to meet ignorant people, and that's okay. You can't control that. You can't change that.

The world of American politics is more contentious than it has ever been in my lifetime.

There are people that regardless of what it is, if it's something that's stressful, whatever it may be, they don't eat, they lose a lot of weight, a divorce, they get real thin. I'm the opposite.

Which, of course, isn't the point of writing - but it would be nice if, along with the creative satisfaction of writing and seeing my work in print, I could do more than merely scrape a living. Okay, moaning over.

I think plays have nothing to do with one's own personal life. Not in my experience, anyway. The stuff of drama has to do, not with your subject matter, anyway, but with how you treat it. Drama includes pain, loss, regret - that's what drama is about!

In college, I would follow Bob Dylan around, and I would show up to a concert, and he would sing some song he hadn't sang in a long time, and it would speak to something, and I would think it had some great fateful implication.

My greatest fear is speaking in public.

I love being creative.

Transparency, honesty, kindness, good stewardship, even humor, work in businesses at all times.

The brevity of life is grace to walk on your own path.

My youngest sister, Cindy, has Down syndrome, and I remember my mother spending hours and hours with her, teaching her to tie her shoelaces on her own, drilling multiplication tables with Cindy, practicing piano every day with her. No one expected Cindy to get a Ph.D.! But my mom wanted her to be the best she could be, within her limits.