title: Swift 3d Array creating
body: <p>I want to create an array that is 3d. Array will be 5*5*infinite (the last or the innermost array will probably has like 3-5 object of type String).</p>
  
  <p>I tried something like this:</p>
  
  <pre><code>var array3D = [[[String]]]()
  </code></pre>
  
  <p>and tried to add new string like this </p>
  
  <pre><code>array3D[ii][yy] += y.components(separatedBy: ";")
  </code></pre>
  
  <p>But had problems adding new arrays or strings to that. And got error of exc bad instruction</p>
  
  <p>In school I have 5 lessons per day. So in week there is 25 lessons, and I want to make an iPhone app that represent my timetable.</p>