I am confused about the example of context parameter from documents

[log系統帳號 b]

I am confused about the example from here: https://developers.google.com/api-client-library/javascript/features/promises#context-parameter,

It is about context parameter.

I found I never have a chance to know when the results are ready.

Take the following example,

I add console.log(personFetcher.results); to the end of script, it always return empty, because it is asynchronous.

So, my problem is how can I access the results, when it's ready?

var personFetcher = {
  results: [],

  fetch: function(name) {
    gapi.client.request({path: '/plus/v1/people', params:{query: name}}).then(function(response) {
      this.results.push(response.result);
    }, function(reason) {
      console.error(name, 'was not fetched:', reason.result.error.message);
    }, this);
  }
};
personFetcher.fetch('John');

[log系統帳號 b]

Forgot about it, I do it through the normal promise way.