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> ?

I always thought moving to New York would mean starting over in theater, because I had great work in Chicago and didn't want to become a waitress here.

The free sharing and teaching of open source is incompatible with the notion of the solitary genius.

But I had no idea that they were going to pull the plug so quickly.

Every happy girl has a broken heart. But every broken heart girl is not happy

I moved to New York between my junior and senior years of high school to just see what it was like, to go to a modeling agency and see how to get representation.

A cocktail done right can really show your guests that you care.

It is not truth, but opinion that can travel the world without a passport.

Gray hair is Gods graffiti

The beauty of a woman must be seen from in her eyes, because that is the doorway to her heart, the place where love resides.

Don't rush the process. Allow yourself to grow at your own pace. Stop comparing your life to what other people are doing.

Last night you left me and slept your own deep sleep. Tonight you turn and turn. I say, 'You and I will be together till the Universe dissolves.' You mumble back things you thought of when you were drunk.

I entered KC College in 1975. When I came here for my interview, for my admission, every person I spoke to spoke to me in Sindhi. Be it Kundanani, Bhambani, Nichani, Kevalramani... and they also thought that Ambani was the same. For a moment, I thought that I got my admission at KC College because I have a 'ni' in my surname.

Small business is the backbone of our economy. I'm for big business, too. But small business is where the jobs are generated.

When I was a kid, nobody told me I was good-looking. I wish they had. I would've had a better time.

Our flaws are obvious yet we are loved and able to love if we choose because there is that bit of the divine still smoldering in us.

I get interested in writers who are enigmatic.

For most people, the major hurdle in grasping modern insights into the nature of the universe is that these developments are usually phrased using mathematics.

The world of fiction is a sovereign world that comes to life in the author's head and follows the rules of art, of literature. And that is the major difference that is reflected in the form of the work, in its language and its plot. An author invents every aspect of a fiction, every detail.

If we should be blessed by some great reward such as fame or fortune its the fruit of a seed planted by us in the past.

Men say they love independence in a woman but they dont waste a second demolishing it brick by brick.

I dance around my living room to cheesy '80s aerobics music until I'm sweating really hard!