add some comments

Author: alicewriteswrongs

static/js/util/redux.js

@@ -10,13 +10,21 @@ export function createActionHelper(dispatch: Dispatch, actionCreator: Function):
   return (...args) => dispatch(actionCreator(...args));
 }
 
+/*
+ * returns an array of simple (synchronous) action helpers when passed the
+ * dispatch function and an array of synchronous action creators
+ */
 export type ActionHelpers = Array<{[k: string]: (...args: any) => void}>;
 export function createSimpleActionHelpers(dispatch: Dispatch, actionList: ActionCreator[]): ActionHelpers {
   return actionList.map(actionCreator => (
     { [actionCreator.name]: createActionHelper(dispatch, actionCreator) }
   ));
 }
 
+/*
+ * returns an array of async action helpers from async action creators (those
+ * that return a function taking dispatch as an argument)
+ */
 export type AsyncActionHelpers = Array<{[k: string]: AsyncActionHelper}>;
 export function createAsyncActionHelpers(dispatch: Dispatch, actionList: AsyncActionCreator[]): AsyncActionHelpers {
   return actionList.map(actionCreator => (