How to compare 2 lists and return a new list with the missing values using ScriptRunner

[Praveen]

I have 2 lists eg ListA[1,2,3,4] and ListB[2,3]. I need to compare both and create a new list with the values that are not found in ListB (i.e. ListC[1,4]).

[Joshua Yamdogo @ Adaptavist]

You might try doing it like this:

def l1 = ["1", "2", "3", "4"]
def l2 = ["2", "3"]
def commons = l1.intersect(l2)
def difference = l1.plus(l2)
difference.removeAll(commons)
return difference

See image for result.