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    Group Data by Key with the groupBy Operator


    The groupBy operator is one of RxJS's best kept secrets. In this lesson, you'll get an introduction to grouping data together by key. We'll use both hard-coded data and data coming from a server.

    To dig deeper into groupBy, check out What GroupsBy in Vegas Stays in Vegas, the talk Mike Ryan and I gave at RxJS Live 2019.