Writing Code? Know Your Boundaries.
bitnative.com
bitnative.com
The text also doesn't explicitly about which direction the dependencies should go. Though the diagram hints at some asymmetry, I am not sure whether this is intentional. For instance I try to make my HTML oblivious to both CSS and JS. But they of course know about the structure of the HTML, to respectively present and manipulate the content.
When I read the linkbait title, I implicitly thought "writing code? FIND your boundaries". Think threading is simple? Write something nontrivial with threads. Discover how outrageously hard threads are!