What is the advantage of a class component over a functional component? — A class component has additional feature. In particular, it lets you manage state and lifecycle.

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 ...

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)

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> ?

If you never change your mind, why have one?

Discover the time of day when you write best, and write then. For me it's about 7 am to noon. For other people it's overnight. Try not to do anything other than write between those times.

Write comic books if you love comic books so much that you want to write them. Don't write them like movies. Comics can do a lot of things that movies can't do, and vice versa.

We think we receive all that we perceive, but in fact, we actually give the sky its colour.

A society is defined not only by what it creates but also by what it refuses to destroy.

Procrastination is a sign of a perfectionist.

I dress like a bum all the time. I'm a pretty casual fella.

If you tell your story well, it can help attract customers; it can help people understand your business better, and you are more approachable as a business and a company.

I remember looking through magazines or watching movies even just a couple of years ago and being like, 'I really want to be part of that,' but not realizing what that was.

When you follow your heart's calling, you wind up becoming your most powerful self. You don't need to take power from others if you can tap into your own inner power.

I mean the flesh, never fade! The flesh never leave the creation, see, because with that divine spirit the flesh cannot fade. If the spirit is weak then the flesh fade, seen?

Make no mistake about it - Islam is just not another way to approach God.

If youre in a bad situation dont worry itll change. If youre in a good situation dont worry itll change.

The best thing about being a fiction writer is that where the truth is inconvenient, I could veer away.

The particular aspect of time that I'm interested in is the arrow of time: the fact that the past is different from the future. We remember the past but we don't remember the future. There are irreversible processes. There are things that happen, like you turn an egg into an omelet, but you can't turn an omelet into an egg.

Simply stated, girls want role models and mentors.

I grew up in a somewhat religious family. My dad's family isn't religious at all, but my mom's side of the family is, so I was exposed to church a bit.

Somebody made the statement that Donald Trump has built or owns the greatest collection of golf courses, ever, in the history of golf. And I believe that is 100 percent true.

I am very bad at computers. I don't really know how to write email.

The most important thing to me with any politician is that they don't start wars, but education is a big part of that, too, because educated people are less likely to do stupid, violent things.

In the history of women's tennis the great players have come back from long absences with no problems.