Redux architecture revolves around a strict unidirectional data flow.

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?

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> ?

Washington is not a city that takes great pride in being a healthy place, necessarily. Now, I have no data. That's just my own observation.

I think the tradition of well-written history hasn't been squashed out of the academic world as much in Britain as it has in the United States.

Watching your husband become a father is really sexy and wonderful.

People don't believe in positive changes anymore.

Once I'm in a situation where I can not do anything for three years and go off the map, I'll focus more on writing. Right now, I want to just make Flume awesome... and big.

I think you get so wrapped up in the book you're currently writing, it's hard to think about anything else. But I know as soon as I'm done with this book, I'll move on to something else.

But the beginning of things, of a world especially, is necessarily vague, tangled, chaotic, and exceedingly disturbing. How few of us ever emerge from such beginning! How many souls perish in its tumult!

Reject cynicism. Reject certitude. And don't be a jerk. Be a good guy.

A woman's body never really belongs to herself. As an infant, my body was my mother's, a detachable extension of her own, a digestive passage clamped and unclamped from her body. My parents would watch over it, watch over what went into and out of it, and as I grew up, I would be expected to carry on their watching by myself.

The morality of compromise sounds contradictory. Compromise is usually a sign of weakness or an admission of defeat. Strong men dont compromise it is said and principles should never be compromised.

If you are allergic to a thing, it is best not to put that thing in your mouth, particularly if the thing is cats.

You need to put easy, nice, tranquil thoughts in your head before you go to bed. You know what I do? I read metaphysical books. The good stuff stays in your brain once you go under.

You can do anything you want to do.

There is no longer any anonymity on the Web - unless we mandate it. The most personal information about your online habits is collected, bought and sold, often instantaneously and invisibly. Data collection is a business driven by profits at consumers' expense.

When I read Mike Webster's file before I began his autopsy, I knew he was more than a 50-year-old heart attack victim. His file and the television reports of the death of the former Pittsburgh Steelers center described a long, steep fall into bizarre behavior. I suspected he suffered from some sort of brain disorder.

I wouldn't tell anyone to study werewolves - I studied wolves, how they moved, their tendencies and sensibilities.

The boring thing with taking a walk with someone is that your thoughts are then dictated by the subject or subjects of your conversation and that is made worse by the fact that most sane people are terrified of silence whenever they are with or near someone.

All things being equal, if we could simulate the same scenario, he has a lot more difficult task. He's elected to swim six individual events, as opposed to what I elected to do, which was four.

As you are now so once were we.

I definitely wasn't cool in high school. I really wasn't. I did belong to many of the clubs and was in leadership on yearbook and did the musical theater route, so I had friends in all areas. But I certainly did not know what to wear, did not know how to do my hair, all those things.

No matter the situation don't let your emotions overpower your intelligence.