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.

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.

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> ?

You can't worry about ageing because that's the worst thing. If you start, then you just keep finding more things you don't like, and then you're finished. There are a lot of things I could have done to my face, but it would never stop.

The vampires in the 'VAMPS' series judge each other as harshly as they judge humans, and basically, vampires don't get along very well. So you've got a culture that's from cradle to grave like the worst high school you've ever been in.

Anyone taking heroin is thinking about taking heroin more than theyre thinking about anything else. Thats the general rule about most drugs.

Sometimes, if you don't have kids yourself, it's assumed you won't understand or know how to play a mom, which is kind of silly if you think about it.

I think one thing with Sweden is that in some way the Swedish society is a very good society, almost perfect on the surface. That is something that makes the writers forced to see what is underneath the surface, because it's always something underneath the surface, of course.

This is the essence of all sciences - that you should know who you will be when the Day of Reckoning arrives.

Some people, no matter how old they get, never lose their beauty “ they merely move it from their faces into their hearts.

It's all about training smart.

The more downtime we have, the more time you have to play games like 'Ghost Recon Future Soldiers,' so for me it's a fun way to get integrated into video games and for me to have fun with my buddies and team up and go into battle with 'em, kind of like out there on court.

Gee I don't know, I just want to get home.

I think it's more interesting to throw people into a story and let them catch up instead of explaining and feeling like you have to slow down for them. I think audiences, for the most part, they don't want to be ahead of you.

I think you just assume that your memory is just sort of a video playback of your experience, but it's nothing like that at all. It's a complete refabrication of an event and a lot of it is made up, because you're filling in spaces.

What's invisible to us is also crucial for our own well being.

Title deeds establish and protect ownership of our houses, while security of property is as important to the proprietors of Tesco and Sainsbury's as it is to their customers.

Most men remember obligations, but are not often likely to be grateful; the proud are made sour by the remembrance and the vain silent.

Masterful politicians and effective agents of change tend to succeed by singling out and making salient some aspect of a nation's self-understanding, sparking a sense of recognition - and ultimately moving voters in their favor. Obama made it into an art form.

Hope is some extraordinary spiritual grace that God gives us to control our fears not to oust them.

I have never known a really chic woman whose appearance was not, in large part, an outward reflection of her inner self.

Be bright like the afternoon sun and let everyone who sees you feel inspired by all the great things you do. You have one life here on earth. Make it count in whatever way you can.

Our thoughts dictate how we feel; so it is important to recognize that we are as we think we are.

Joys too exquisite to last, And yet more exquisite when past.