advantage of immutability in Redux? — performance: you avoid re-renders and re-calculations you alway know what changed.

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?

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.

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> ?

Sometimes, it's good to have a tremendous star, because everyone understands he has to get the ball.

The memory of that scene for me is like a frame of film forever frozen at that moment: the red carpet, the green lawn, the white house, the leaden sky. The new president and his first lady.

Players respond to coaches who really have their best interests at heart.

When you are scoring runs, you automatically become a good leader because you are armed with so much confidence. If you struggle with your performance, then it becomes very difficult for a leader to perform his role.

If you don't feel apologetic for slavery, if you don't feel apologetic for colonialism, if you feel proud of it then say that.

There was a study done in the early 20th century of all the entrepreneurs who entered the automobile industry around the same time as Henry Ford; there were something like 500 automotive companies that got funded, had the internal combustion engine, had the technology, and had the vision. Sixty percent of them folded within a couple of years.

I became a vegetarian at age 13 because I was into animal issues and felt like it was kinder not to eat animals.

There is nothing like a challenge to bring out the best in man.

Like most people, I've grown a lot more sophisticated in my style choices. I know myself and what suits me better now than I did when I was much younger and feel more comfortable in my own skin.

A real gentleman, even if he loses everything he owns, must show no emotion. Money must be so far beneath a gentleman that it is hardly worth troubling about.

When I'm not working on the ground, spending time with my husband and daughter puts me at ease.

Success often comes to those who are too naïve to know that what they're trying to do is impossible.

I think the way we think about cancer, the way we treat cancer, has dramatically changed in the last century. There is an enormous amount of options that a physician can provide today, right down from curing patients, treating patients or providing patients with psychic solace or pain relief.

France and Germany have the manufacturing and skill base which is useful to us. France is our dependable strategic partner.

What farmers require is, that the prices should be moderate, and the markets steady; and for this reason I did, in 1826, 1827, and 1828, take the course which I would now recommend to the House.

'The River Wild' was great, with Meryl Streep. That guy was really a bad dude who was ultimately sort of fundamentally impotent in a weird way. That was kind of interesting.

My mother use to call me 'Miss Perpetual Motion' because I rarely keep still.

You've got to have this burning desire in your chest to succeed.

If you are far from the enemy make him believe you are near.

This is a new year. A new beginning. And things will change.

But time has set its maggot on their track.