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v4.2
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    中文EN
    v4.2

      difference()

      Function difference() calculates the elements that exist in the 1st array but not in the 2nd array and returns them as a new array, namely, returns the difference of these two arrays (repeated elements are allowed in the difference).

      Arguments:

      • 1st array <array>
      • 2nd array <array>

      Returns:

      • Difference <array>

      If the two arrays are non-homologous, Cartesian Product will be applied when the function is called in a WITH clause, or aliases will be trimmed when called in a RETURN clause.

      Common Usage

      Example: Find the neighbors of Card CA001, and remove the nodes that are also neighbors of Card CA002, and return as array

      khop().src({_id == "CA001"}).depth(1) as n1
      khop().src({_id == "CA002"}).depth(1) as n2
      with collect(n1) as a1, collect(n2) as a2
      return difference(a1, a2)
      
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