What's the purpose of a reducer? — It's a PURE function that ties state and actions together. it takes the previous state and an action, it returns tje next state.

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 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.

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> ?

The moment we put an end to speculation in land, we put an end to making money at the expense of our sons and daughters.

My thoughts are stars i cannot fathom into constellations.

When you spend seven years of your life working on something that you're really passionate about, and other people end up loving it, too, that just makes all of the work worthwhile.

Nearly all of the major kinds of life, divisions of life, phyla of animals, occur in the sea. Only about half of them can make it to land or freshwater.

If nice guys finish last, then great guys come in right after them.

As your kids grow they may forget what you said, but won't forget how you made them feel

Obamacare is making people divorce so they can afford it. And divorce hurts women and the children, and that is Obamacare and their War on Women.

You know, I've never been much of a method actor. I feel like, with every project I go in extremely prepared and I like to have a good time.

I didn't get depressed, I don't get depressed.

I remember a hundred lovely lakes, and recall the fragrant breath of pine and fir and cedar and poplar trees. The trail has strung upon it, as upon a thread of silk, opalescent dawns and saffron sunsets.

Scholarship was one thing, drudgery another. I very soon concluded that nothing would induce me to read, let alone make notes on, hundreds and hundreds of very, very, very boring books.

I remember the dark days when, thanks to 1966's 'Batman' with Adam West, comics were considered the ugly stepchild of popular culture.

The rules of soccer are very simple basically it is this if it moves kick it. If it doesnt move kick it until it does.

It takes the same effort to think small than to think big. But to think big frees you from the insignificant details.

I don't watch that much television.

Associate yourself with men of good quality if you esteem your own reputation. It is better be alone than in bad company.

Copyright protects corporate monopoly rights over culture and provides much of the profits to media conglomeratesm encouraging the wholesale privatization of our common culture.

I took my children to see 'Son of Rambow,' about two boys who make a home movie with a video camera. When you have children, culturally you become involved in their life.

I defend the right of almost everything to be published... because I think that you're better off in trusting the marketplace than allowing other people to make that decision.

To the extent that '60s guys own things, yes... but I don't have the publishing, just like most '60s guys, and that was an error, you know... part ownership in publishing was the kind of era that started a little bit later, when real businessmen started to manage artists.

You treat the air as a canvas and the paint is the chords that come through your fingers, out of the keyboard.