Two services that do almost the same thing; we can abstract out the repetition.

adoptingAngular_example4.js

// An example showing two services that are nearly identical
angular.module('petStoreApp', [])
  .service('catService', function($http) {
    var svc = {
      getList: function() { // get a list of all cats
        $http({ method: 'GET', url: 'cats/all' })
          .then(successFn, errorFn);
      },
      getInfo: function(catId) { // get info about a specific cat
        $http({ method: 'GET', url: 'cats/' + catId })
          .then(successFn, errorFn)
      }
    };
    
    return svc;
  })
  .service('dogService', function($http) {
    var svc = {
      getList: function() { // get a list of all dogs
        $http({ method: 'GET', url: 'dogs/all' })
          .then(successFn, errorFn);
      },
      getInfo: function(dogId) { // get info about a specific dog
        $http({ method: 'GET', url: 'dogs/' + dogId })
          .then(successFn, errorFn);
      }
    };
    
    return svc;
  })