While I was interested in the article, the mistakes in the code examples are so frequent that, by the end, I was wondering if the array example had an error. I

While I was interested in the article, the mistakes in the code examples are so frequent that, by the end, I was wondering if the array example had an error. I couldn't really make sense of the suggestion there. These issues would easily be captured in a first draft or with a simple review of the examples.