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This definitely sounds right. But is this from your experience ?

• sitkack 10y ago
  It is from experience. When I was a junior programmer, I overly focused on the end goal, coding until "things worked". Projects got finished, but the internals had cruft and parts were poorly understood. I was not mastering anything. Now I do more thinking, parts that are poorly understood are mapped out with unit and integration tests. Those tests are just little scientific confirmations of how universe of the application works.