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.

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

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.

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've never done fashion school or anything like that. But I have good instincts.

I believe the adventure game genre will never die any more than any type of storytelling would ever die.

I've always loved working out. When I was little, my dad used to make me and my sister do 10 press-ups every day before we brushed our teeth in the morning. It was like a boot camp! Then I did a lot of athletics at school and was a dancer.

You get a little moody sometimes but I think thats because you like to read. People that like to read are always a little fucked up.

Sometimes I can think of nothing more blissful than going to Berkeley and reading Byron for three years.

I quite agree with you. The sun is not kind. God should use a rose amber spot.

Getting in shape for this role, which is incredibly demanding, vocally, has been a lot of hard work, but I'm nailing it. I'm even kind of, at times, blowing my own mind, because I am even able to talk right now.

There's a reason I moved to NYC, and if I listed all the musicians on my list you'd grow weary.

Comedy is far more difficult, as it involves improvisation and impromptu acting, and as an actor, that came as a welcome break for me.

I am sufficiently proud of my knowing something to be modest about my not knowing all.

My ideal prom date would have to be cute, funny, sweet, nice.

The thing is, you try your best, and what else you got? You try your best, really, that's all you can do. And for me, my best happens really so rarely.

Contentment consist not in adding more fuel but in taking away some fire.

History has proven time and again that downturns are the best time to invest in new start-ups. You get good deals and find a better environment for start-ups to grow.

In terms of soccer, it wasn't really a thing that girls did. In England it more kind of Net Ball and Hockey and stuff like that in athletics. It's to each their own, really.

I went to a public high school that had a very small graduating class of 156 students. I lived a relatively normal childhood until I turned probably around 16. Things started to take off career-wise.

To make an absolutely gross generalization, I think a lot of people feel like if you're mixed, more often than not you're quote unquote white. So if you're mixed, you embrace the mainstream culture more than the African-American culture.

Abortion is a hard thing for Hollywood to deal with because it is so controversial and you don't want to alienate half your audience by sending one message or the other.

Even though many couples are choosing to marry later in life, our laws haven't been updated to address dating partner abuse.

Once you're signed to a label you compromise.

I have hope in people, in individuals. Because you don't know what's going to rise from the ruins.