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Thread: What does the question mark mean in Power Query?

  1. #1
    Acolyte ExcelStarter's Avatar
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    What does the question mark mean in Power Query?



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    https://community.powerbi.com/t5/Pow...1441336#M45058

    I saw something weird in smauro's answer.

    =List.Accumulate(List.Sort(#"Changed Type"[Code]), {},
    (s, c) =>if ((c - List.Last(s){0}?)??1) <= 1
    then List.RemoveLastN(s, 1) & {{c, ((List.Last(s){1}?)??0) + 1}}
    else s & {{c, 1}})

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    What does the question mark mean in Power Query?
    Last edited by ExcelStarter; 2020-10-19 at 12:47 PM.

  2. #2

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