As someone who went through the official Tensorflow 'get started' and many mini tutorials the net, I found this article of no help. It introduces a multitude of libraries, math notations, ML concepts and lots of (random?) undocumented constants.

There's a big leap from relatively simple concepts to the relatively complex example for what is to be considered "101". I would still recommend that people start with https://www.tensorflow.org/get_started/get_started