title: Why the need for if(0) and if(1)
body: <p>Look at this piece for code in ArcGIS 3.0 for javascript. <a href="https://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.0" rel="noreferrer">https://serverapi.arcgisonline.com/jsapi/arcgis/?v=3.0</a></p>
  
  <p>Inside there is "if(0)" and "if(1)", why is there a need for this? Isn't if(0) always false and if(1) always true?</p>