title: Angular2 not updating/transpiling/compiling correctly
body: <p>I'm a beginner with this framework and I'm frustrated. I've just about given up on learning Angular2 for now, but can someone please explain to me how I can copy line for line the code in the docs and it still not work?</p>
  
  <p>Earlier on I've seen instances of it calling classes that I've long gotten rid of. I reinstalled everything, upgraded npm to 3.1.0, made sure node is up to date, and tried again. Maybe I shouldn't have taken this unfinished language up when I'm a beginner (no idea how to debug), but I'm speaking of the 'Heroes' tutorial on their site.</p>
  
  <p>The view is supposed to show "Loading..." then get info from the app component. In the beginning, it loads as it should, but then I get to that "Master/Detail" in the tutorial and it all goes to boom boom. Let me show you my code: </p>
  
  <p><a href="https://i.stack.imgur.com/9P7NZ.jpg" rel="nofollow">Well this is the app component. This code worked at first until I got deeper into the tutorial. I go back to this code, and it doesn't work anymore. What gives? Followed the doc to the 't'</a></p>
  
  <p><a href="https://i.stack.imgur.com/J55VA.jpg" rel="nofollow">I had to comment out this code because it made the app mysteriously stop working. Stopped when I passed the array in the constant HEROES to the property heroes. Again, this is in the docs.</a></p>
  
  <p>The index and module files are fine. I've stopped and restarted at least four times and I've about had it. I think I'll just finish learning the regular MEAN stack. Unless someone can come up with a reason why all of this is happening? I see no fault in my code. And even if there was, changing my code or undoing changes should produce results. IT DOESN'T!</p>
  
  <p>I'm thinking it's more to do with the transpiling process, and it not updating TS to JS properly? Which could explain why I was still seeing error messages saying it was trying to call classes I've already gotten rid of.</p>