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Anonymous's avatar
Anonymous
Not applicable
6 years ago
Solved

"?" in M syntax

Can somebody explain the meaning / function of the "?" in the statement below?   = Table.SelectRows(Source, each [Attributes]?[Hidden]? <> true)
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  • Jimmy801's avatar
    Jimmy801
    6 years ago

    Hello Anonymous 

     

    is a kinda of error handling. When a column, record or list access isn't existing you normally get an error whereas you get the value null if you add the "?"

     

    Hope that helps

     

    Jimmy

Jimmy801's avatar
Jimmy801
Community Champion
6 years ago

Hello Anonymous 

 

is a kinda of error handling. When a column, record or list access isn't existing you normally get an error whereas you get the value null if you add the "?"

 

Hope that helps

 

Jimmy

  • Anonymous's avatar
    Anonymous
    Not applicable
    6 years ago

    Thanks. Any reference?

    • Jimmy801's avatar
      Jimmy801
      Community Champion
      6 years ago

      Hello Anonymous 

       

      check out this document link 

       

      If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
      Kudoes are nice too

      Have fun

      Jimmy