## Redux

1. Use Immutable.js for non primitives, such as lists, objects, maps, etc.
1. Store keys of Immutable.js values should be named with prefix `$$`
Store should be of the shape:

```js
export type StoreType = {
  $$commentsStore: $$Map<string, any>,
  $$profileStore: $$Map<string, any>,
};
```

## Action Creators
This is boilerplate code that creates Redux "actions". These a functions to initiate a mesasge to Redux, which can update the store via reducers, kick off a redux saga, trigger other middleware, etc.

Each action creator has the following parts:

1. actionType: Unique string which identifies the action. All the redux listeners will use this actionType.
2. List of param values.







## Selectors
Functions of the form (flow syntax)

```js
(store: {}) => {}
```

Notes:

1. Store contains Immutable.js
2. Selectors convert Immutable, like this:
  `(store) => store.$$somePartOfStore.toJS()`
3. Note that we know that toJS is on the `$$somePartOfStore`, as it's named with the `$$`