New Oxford American Dictionary array | əˈreɪ | noun 1 an impressive display or range of a particular type of thing: there is a vast array of literature on the topic | a bewildering array of choices.

The word, "array" means order or arrangement usually in a person's clothing. For example, you could say, "he was arrayed in the finest silk garments. The word is used in a figurative way in your sentence. You can substitute the word "array" with either variety or diversity. Hope this helps