In addition to the existing snippets, which I would recommend revisiting to make them clearer (like with map)

It would be nice adding some additional ones:

• require
• esriConfig.apiKey = "..."
• Map:
  • create2DMap (a.k.a map)
  • create3DScene (a.k.a. scene)
  • load2DWebmap (a.k.a webmap)
  • load3DScene (a.k.a. webscene)
• View:
  • hitTest
  • mapViewConstraints: scale, zoom, rotation, extent
  • sceneViewConstraints: for camera tilt and altitude
• Markers:
  • addDefaultMarkerToView
  • addCustomMarkerToView
  • addMarkerWithPopup
• Navigation:
  • enableSmoothScrollNavigation snapToZoom
  • disableViewNavigation
  • disableViewRotation
  • disableViewMouseWheelNavigation
  • disableViewSingleTouchNavigation
• Others
  • watchPropertyChanges (reactiveUtils)
  • watchPropertyChanges (Accessor.watch())