Описание тега ng-repeat
`ngRepeat` is part of the Angular.js API. It instantiates a template once for each item in a collection.
The ngRepeat directive instantiates a template once per item from a collection. Each template instance gets its own scope, where the given loop variable is set to the current collection item, and $index is set to the item index or key.
Special properties are exposed on the local scope of each template instance, including:
$index – {number} – iterator offset of the repeated element (0..length-1)
$first – {boolean} – true if the repeated element is first in the iterator.
$middle – {boolean} – true if the repeated element is between the first and last in the iterator.
$last – {boolean} – true if the repeated element is last in the iterator.