title: TypeError: this.$set is not a function
body: <p>Hi I am geting this error:
  <strong>Uncaught (in promise) TypeError: this.$set is not a function</strong></p>
  
  <p>And here is the code:</p>
  
  <pre><code>     export default {
          data: function() {
              return { movies: '' }
          },
  
          ready: function() {
              this.showMovies()
          },
  
          methods: {
              showMovies: function() {
                   this.$http.get(config.api.url + '/movies').then(function (response) {
                      this.$set('movies', response.data)
                   })
               }
          }
       }
  </code></pre>