A Vague Coding Tip: Never Expect Data to be Ordered Correctly

If you’re processing data, try to do all you can to avoid depending on the order of the incoming data. This gets a little tricky if your incoming data is flat, and you’re building it up into a tree or graph, and you get children before parents. But, trust me, you’ll thank yourself when you don’t have to figure out that the only reason you’re getting a NullPointerException if because your data is no longer ordered as you expect it.

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