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 })

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)

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> ?

I love my shape because I work really hard at it. I honor my body by working out and seeing what it can do.

If you're going to exude naivete, you can't really... walk out there like it's a Sting show. You can't be that well put together and then have this kind of innocent bravado.

The first thing I do when I get up in the morning is wash my face with Olay Regenerist Thermal Mini-Peel Face Wash. My skin is super-dry, and this one is great for basically any skin type. As you cleanse your face, the face wash gets warmer, so it's soothing and also has some exfoliation to it.

I don't take off as many days as most other producers and songwriters, so I'm working every single day, and I do songs every day. So it's just about finding time, scheduling, getting in and cutting the records. I make it happen and that's the name of the game. It's no excuses - you gotta figure it out.

Easy is to occupy a place in a telephone book. Difficult is to occupy someone's heart; know that you're really loved.

I feel like if I'm sick, I need flowers. I'm very open about saying what I need from a partner, and he needs to meet those demands.

I don't enjoy any kind of danger or volatility. I don't have that kind of 'I love the bad guys' thing. No, no thank you. I like nice people.

People go surfing before work and paddling afterward. My husband is from Wisconsin, and he goes to work in his Hawaiian shirt.

I thought I'd grow up to be a teacher, or maybe run for political office.

In August most of Europe goes on holiday.

Randy Newman and I grew up together in Los Angeles. We are both products of the film studio era. Randy is one of the great songwriters of our time and one of the fun people to be with.

Every suit I wear is custom-made by a guy named Waraire Boswell in L.A.

Madness doesn't happen to someone alone. Very few people have experiences that are theirs alone.

Power tends to get confused with repression.

I think one of the most important things punk brought back was the whole concept of staying independent and doing things yourself. It made music a lot less boring in any category you can name.

I've worked in public education for 30 years - as a teacher, a lawyer and union leader. I've visited hundreds of schools and districts. I've seen leaders from the classroom to the national stage who have been willing to set aside their differences and do the hard work that's necessary to create real, enduring change.

Europe itself is an embodiment of this diversity.

How unfortunate, considering I have decided to loathe him for eternity.

I want to feel beautiful like when he told me I was.

From your parents you learn love and laughter and how to put one foot before the other. But when books are opened you discover that you have wings.

I reject the cynical view that politics is a dirty business.