mikeholler commented on issue #7897: [FLINK-11817] Uses aggregate function in DataStream API Tutorial URL: https://github.com/apache/flink/pull/7897#issuecomment-469716062 I'm a beginner at Flink, and the creator of the original issue FLINK-11817. First of all, HUGE thank you for responding and opening an MR so quickly. Secondly, it strikes me as a beginner that this new `aggregate` API is much more complicated than the very simple `fold` function. Again as a novice, it seems like the experience of coding with the deprecated function is easier than with the new one. So, the question I have, which has nothing to do with the quality of this merge request, is whether there's somewhere I can go to learn about why this change was made? I can only assume that this was done for reasons beneficial to the Flink backend, since the same thing became harder for the end user. I'm only starting to grasp how Flink works and this seems like a good way for me to dive a little deeper. Thanks again for the quick fix!
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