title: create and use one object in another in angularJS
body: <p>I have a variable/object called Student.
  it's attributes are: name,surname,address.I want it to have one more attribute-"classroom", All I want is to create a new object classroom,which attributes will be "class_number" and "class_type"...
  So I want:</p>
  
  <pre><code> var student : [{
      name: "Jacob"
      surname:"Black"
      adress:"Baltimore Street N2",
      classroom: // I dont know how to write this
      }];
  </code></pre>