Integrating Foursquare or Yelp API with Ionic

I was reading the tutorial on how to integrate backend service with ionic found here, http://learn.ionicframework.com/formulas/backend-data/, and was trying to apply same concepts to a more dynamic application using third party API’s. But I am not sure where to start. From this point I have only worked with static data. I wanted to integrate ngResource and populate an <ion -list> with restaurants in nearby area through either the foursquare or yelp api. I have no idea how to do this however. Anyone want to mockup a tutorial or point me in the right direction?

A good resource for $http, besides that blog post, is this video from egghead

And to check out other projects people have made with the APIs