Parameters, Value

Array Difference function calculates the elements exist in array1 but not in array2, and returns them as array (repeated elements are allowed within the arrays).

If array1 and array2 are not homologous: when used in WITH, intersection() will first make a Cartesian Product Combination of all columns and its homologous columns before calculation; when used in RETURN, intersection() will trim all columns and their homologous columns before calculation.

Syntax:

• Format: difference(<array1>, <array2>)
• Parameters: see table below
• Value: ARRAY

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)