How to find difference of two List Option type so that elements present in List A are not in List B

[Sujatha]

Hello,

I am writing a groovy code. My Code has two List of type Option value fetched from custom field(NewRes and OldRes).

def ListA = issue.getCustomFieldValue(newRes) as List<Option>
def ListB= issue.getCustomFieldValue(oldRes) as List<Option> 

Assume that Option List A  and List B has following set of values:

List A :  { os, op, jp, zp} and

List B : {op,zp}

How to find elements such that they are in List A but not in List B.

I need a third List option(List C) with elements in A but Not in B i.e List C must contains { os, jp}

Please reply. Thanks !

[Rambabu Patina _Appfire_ · Accepted solution]

You can try use:
 def newlist = ListA.minus(ListB);

[Rambabu Patina _Appfire_]

For your reference see the API http://docs.groovy-lang.org/latest/html/groovy-jdk/java/util/List.html

[Sujatha]

Thanks Ram for the solution and link 

[Alexey Matveev · Accepted solution]

Hello,

def ListC = ListA - ListB

[Sujatha]

Thanks Alexey. It works!