How to use GCD and survive to brag about it
Betty Kintzlinger

Nice, I enjoyed reading your article.
Although the GCD subject is much wider than this, just two notes I think could fit good in this article also:

  1. Mention that the terminology for the bad ‘main.sync’ inside ‘main.sync’ code, the effect of two tasks that are waiting for each other to finish endlessly is “Deadlock”.
  2. A brief explanation of Concurrency with/without Parallelism.

But overall, very good and straightforward! :)

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