Container Components: How things work (data fetching, state updates) Dispatch Redux actions Are usually generated by React Redux

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.

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> ?

I do not believe that Darren Wilson should've been charged, but Brown should not have lost his life. Brown and Trayvon Martin should've gotten their butts kicked badly. They should've been handled physically, but they should not have been killed.

In Sierra Leone last year there was just the two of us hanging out of a helicopter and, when we were in Bosnia, I drove an armoured vehicle, thousands of miles.

A good marriage is like a casserole only those responsible for it really know what goes in it.

I always carry prayer cards to St. Jude and St. Martha with me.

Yeah, I think speculation keeps things really interesting.

In the Orthodox religion, you don't draw the human figure. It's against the rules.

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We must not be content to memorize the beautiful formulas of our illustrious predecessors. Let us go out and study beautiful nature.

Everywhere in the world, music enhances a hall, with one exception: Carnegie Hall enhances the music.

I have a green thumb. I really like to get into the shrubs, the bushes, and really cultivate.

That was my choice at that time, and I still say Nixon was a great president. A very beautiful and wise man.

You know, a statesman is a dead politician.

What reader wants to be told what attitude to strike?

Art really is something very difficult. It is difficult to make, and it is sometimes difficult for the viewer to understand. It is difficult to work out what is art and what is not art.

If we want to help Google become something meaningfully different in the future, then that's more likely to happen if we focus on the physical world instead.

So, I think I'd be grateful for the next job. I always am. And I always consider everything I do to be the last thing I do.

Extreme law is often extreme injustice.

It's amazing... to enjoy the results of your labor.

I did not study science at school until I was 13, when I was totally turned on by a seemingly dreary old teacher who suddenly, unannounced, manufactured a huge explosion in the middle of a totally boring monologue. From then on, all of his class wanted to make explosions.

Armadillos make affectionate pets, if you need affection that much.

It had always been a dream of mine to come to New York to work. Coming to New York and looking for work is one thing, but coming to New York and already having a job and feeling like you are already part of the city has been an amazing experience for me.