title: NativeScript: Formatting number typescript
body: <p>I am totally new to nativescript and googling for the some basic stuff is harder than it should be...
  What i want to do is basically this: 
  I have the number </p>
  
  <p>1234567.89 </p>
  
  <p>in a variable, and i want to show it in a label with the format</p>
  
  <p>"1,234,567.89"</p>
  
  <p>Also, always show 2 decimals in case that 89 is 0 instead. </p>
  
  <p>Thanks for the help in advance</p>