@raydavis instead of writing it like this, what do you think about the following solution:

```javascript
if (!ccn_to_sites[site_section.ccn]) {
  ccn_to_sites[site_section.ccn] = [];
}
ccn_to_sites[site_section.ccn].push(site);
```

It's how we've been tackling this before in other places of the JS code.