redux: add

redux.md

@@ -0,0 +1,57 @@
+---
+title: Redux
+---
+
+### Stores
+
+```js
+import { createStore } from 'redux';
+ 
+function counter(state = 0, action) {
+  switch (action.type) {
+  case 'INCREMENT':
+    return state + 1;
+  case 'DECREMENT':
+    return state - 1;
+  default:
+    return state;
+  }
+}
+```
+
+```js
+let store = createStore(counter);
+
+store.subscribe(() => { ... })
+store.dispatch({ action })
+store.getState()
+store.dispatch({ type: 'INCREMENT' }); // 1 
+store.dispatch({ type: 'DECREMENT' }); // 10
+```
+
+### React Redux
+
+```js
+React.render(
+  <Provider store={store}>
+    {() => <App />}
+  </Provider>, mountNode)
+```
+
+```js
+class App extends React.Component {
+  render () { return <div>{this.props.message}</div> }
+}
+
+function select (state) {
+  return { message: state.message }
+}
+
+export default connect(select)(App);
+```
+
+## Reference
+
+* [Redux](https://www.npmjs.com/package/redux)
+* [React-redux](https://www.npmjs.com/package/react-redux)
+* [Usage with React](http://rackt.github.io/redux/docs/basics/UsageWithReact.html)