Details

If your value that evaluates to undefined is close enough to an actual value present on the scope, AngularHintInterpolation will suggest an alternative value. Using the HTML code below, you would be notified that data.results[0].entity was undefined but that you should try entities.

//html implementation
<a ng-href="{{data.results[0].entity.urls.main_url}}">Link to Post</a>

//controller implementation
$scope.data = {
  "completed_in": 0.031,
  "refresh_url": "?sinceid=122078461840982016&q=blue%20angels",
  "results": [
    {
      "entities":{
        "urls": {
          "condensed_url": "http://t.co/L9JXJ2ee",
          "main_url": "http://t.co/imgs/users/venrov/L9JXJ2ee"
        }
      }
    }]
}