Hi all,

I have 3 list of account IDs (for 1 sObject is account, for other 2 they are child of account object).

 @AuraEnabled public static List<Account_Reg__c> accNameRegList{get;set;}
 @AuraEnabled public static List<Account_Name__c> accNameList{get;set;}
 @AuraEnabled public static List<Account> accList{get;set;}

I want to compare 3 list of IDs and the get the intersection of those 3 list.
But any of them can come empty also.

• If 1st & 2nd list is not empty, take intersect of themand return the IDs
• If 1st, 2nd & 3rd list is not empty take intersect of them and return the IDs
• If  only one list is not empty , return that list of IDs.

Can you please help me out on this ?
Thanks in advance.