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  1. Add $sort as an array operator in the agg framework

    $filter and $map and $reduce allowed us to stop using $unwind all the time. I know $sort is likely the most computationally expensive peer function to $filter and $map but there are so many times that I have a field with an array of things (scalars or objects) and I need either the whole array in a sorted order or the first or last thing in the sort, for which I would use $arrayElemAt:[ {$sort: {input: ... }}, 0 ] . I see the $sort function signature looking almost like $filter:
    {$sort: {input: <expr that evals to array>,
    as: "gg"…

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    1 comment  ·  Query and Aggregation Pipeline  ·  Admin →
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