How it works

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 })

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React & Redux

For webdevelopers: learning to use React and Redux
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why JSX?
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can you have more than one root dom nodes?
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How do you render an element into the dom?
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Are React elements mutable?
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There are two ways of defining a component: as a function and as a ...
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What is the advantage of a class component over a functional component?
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How do you add local state to a class?
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why are lifecycle hooks important?
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Does redux work only with react?
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Core concepts: actions reducers
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what's an action for redux?
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What's the purpose of a reducer?
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what are the 2 params passed to a reducer?
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what are the advantages of a single store?
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How is Redux different from Flux?
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advantage of immutability in Redux?
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Redux architecture revolves around a strict unidirectional data flow.
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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)
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React bindings for Redux embrace the idea of separating presentational and container components.
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Container Components: How things work (data fetching, state updates) Dispatch Redux actions Are usually generated by React Redux
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Presentational Components How things look (markup, styles) Invoke callbacks from props to change data Are written by hand
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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.
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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.
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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.
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Connecting react and redux: import { connect } from 'react-redux' ​ const VisibleTodoList = connect( mapStateToProps, mapDispatchToProps )(TodoList) ​ export default VisibleTodoList
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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:
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How do you use <provider> ?
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A cake is a very good test of an oven: if it browns too much on one side and not on the other, it's not your fault - you need to have your oven checked.
Delia Smith
In the 8th inning you can't hear the roar of the 9th, all you can do to hold yourself together, and trust.
Jim Abbott
I'm a Taurus. To the bone.
Michelle Pfeiffer
I didn't know that I could do a talk show. I didn't know that we could bring variety to daytime. I didn't know that people wanted to see singing, and dancing and comedy in the morning.
Wayne Brady
Once during a taping there was an actor who kept blowing his lines. It happened again and again. Finally Norman Fell came out-he wasn't even in that scene. But Norman came out and you know what he did? He killed the guy with a hammer.
John Ritter
If you sit down with me, I guarantee I will accept any terms you offer for a contract.
David O. Selznick
So, basically, my view is I don't want to support the exploitation of animals, and within reason, I will do what I can to avoid it, but it's not like it's a religion for me. It's not like I consider I'm polluted if somehow some bit of milk or cheese or something passes my lips.
Peter Singer
I don't see myself as extremely handsome. I just figure I can charm you into liking me.
Wesley Snipes
The great awareness comes slowly, piece by piece. The path of spiritual growth is a path of lifelong learning. The experience of spiritual power is basically a joyful one.
M. Scott Peck
'Tis not where we lie, but whence we fell; the loss of heaven's the greatest pain in hell.
Pedro Calderon de la Barca
If your parents never had children, chances are... neither will you.
Dick Cavett
Playing with friends is a victory.
Fuzzy Zoeller
Come live with me and be my love and we will some new pleasures prove of golden sands and crystal brooks with silken lines and silver hooks.
John Donne
A man must be prepared not only to be a martyr, but to be a fool. It is absurd to say that a man is ready to toil and die for his convictions if he is not even ready to wear a wreathe around his head for them.
Gilbert K. Chesterton
The biggest risk I've ever taken is going on American Idol and trying to be myself. I wasn't going to try too hard to conform, and I knew that it could possibly not work out.
Adam Lambert
To have a part that is written for you certainly helps an actor.
A. J. Bowen
And, of course, some SF is set close enough to here and now that Anglo and European do apply. Since many of the writers come from those backgrounds, so does much of the fiction.
Stanley Schmidt
Wildfires are a result of temperature conditions, of soil moisture conditions; and, of course, something has to start it.
John Holdren
A lot of movies are made, but because they come to film festivals and your movie doesn't get bought by a studio or a distributor, your movie doesn't get seen.
Michael Angarano
I could work out a lot of my emotions by going to class and dancing.
Suzanne Farrell
If you show you're human and have something to say, people will connect with you.
Theophilus London