How do I access the category of an entry with Element API?

Question

The category count is only ever 1 and I need to output the name of the category the entry belongs to.

Would there need to be a cross-over between the EntryModel and CategoryModel?

'transformer' => function(EntryModel $entry) {
                return [
                    'title' => $entry->title,
                    'url' => $entry->url,
                    'jsonUrl' => UrlHelper::getUrl("jobs/{$entry->id}.json"),
                    'postDate' => $entry->postDate->getTimestamp() * 1000,
                    'id' => $entry->id,
                    'jobOverview' => (string) $entry->jobOverview,
                    'category' => $entry->jobCategory[0],
                ];
            },

Answer 1

Same as you would access it from a Twig template. If you're positive there will always be one category selected, then this would work:

'transformer' => function(EntryModel $entry) {
    return [
        'category' => (string)$entry->categoryHandle[0],
    ];
},