old_contents: import React from 'react';
  import { Route } from 'react-router';
  import Main from '../containers/Main';
  import SubredditThreads from '../containers/subreddit-threads';
  import SubredditThreadComments from '../containers/subreddit-thread-comments';
  import { SUBREDDITS } from '../constants';
  import {
    doesStateHaveSubredditThreadComments,
    getSubredditThreads,
  } from '../selectors/main';
  
  export default (store) => (
    <Route path="/" component={ Main } onEnter={fetchDefaultSubreddits(store)}>
      <Route path="r/:subreddit" component={SubredditThreads} onEnter={fetchSubredditThreads(store)} />
      <Route path="r/:subreddit/:thread/comments" component={SubredditThreadComments} onEnter={fetchSubredditThreadComments(store)} />
    </Route>
  );
  
  function fetchDefaultSubreddits(store) {
    return () => store.dispatch({ type: SUBREDDITS.FETCH_DEFAULT });
  }
  
  function fetchSubredditThreads(store) {
    return ({ params: { subreddit } = {} }) => {
      // Always re-fetch subreddit threads when you visit route
      store.dispatch({
        type: SUBREDDITS.FETCH_THREADS,
        payload: {
          subreddit: subreddit,
          count: getSubredditThreads(store, subreddit).size || 25,
        },
      });
    };
  }
  
  function fetchSubredditThreadComments(store) {
    return ({ params: { subreddit, thread } = {} }) => {
      const state = store.getState();
      const shouldFetchSubredditThreadComments = ! doesStateHaveSubredditThreadComments(state, subreddit, thread);
      if (shouldFetchSubredditThreadComments) {
        store.dispatch({
          type: SUBREDDITS.FETCH_THREAD_COMMENTS,
          payload: {
            subreddit: subreddit,
            thread: thread,
          },
        });
      }
    };
  }
  
new_contents: import React from 'react';
  import { Route } from 'react-router';
  import Main from '../containers/main';
  import SubredditThreads from '../containers/subreddit-threads';
  import SubredditThreadComments from '../containers/subreddit-thread-comments';
  import { SUBREDDITS } from '../constants';
  import {
    doesStateHaveSubredditThreadComments,
    getSubredditThreads,
  } from '../selectors/main';
  
  export default (store) => (
    <Route path="/" component={ Main } onEnter={fetchDefaultSubreddits(store)}>
      <Route path="r/:subreddit" component={SubredditThreads} onEnter={fetchSubredditThreads(store)} />
      <Route path="r/:subreddit/:thread/comments" component={SubredditThreadComments} onEnter={fetchSubredditThreadComments(store)} />
    </Route>
  );
  
  function fetchDefaultSubreddits(store) {
    return () => store.dispatch({ type: SUBREDDITS.FETCH_DEFAULT });
  }
  
  function fetchSubredditThreads(store) {
    return ({ params: { subreddit } = {} }) => {
      // Always re-fetch subreddit threads when you visit route
      store.dispatch({
        type: SUBREDDITS.FETCH_THREADS,
        payload: {
          subreddit: subreddit,
          count: getSubredditThreads(store, subreddit).size || 25,
        },
      });
    };
  }
  
  function fetchSubredditThreadComments(store) {
    return ({ params: { subreddit, thread } = {} }) => {
      const state = store.getState();
      const shouldFetchSubredditThreadComments = ! doesStateHaveSubredditThreadComments(state, subreddit, thread);
      if (shouldFetchSubredditThreadComments) {
        store.dispatch({
          type: SUBREDDITS.FETCH_THREAD_COMMENTS,
          payload: {
            subreddit: subreddit,
            thread: thread,
          },
        });
      }
    };
  }
  
subject: fix filename for heroku