function readOnly(count){ }
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
+ Start a Discussion

How to create a Map of List elements with each other


I have an AggregateResult List which has Dealer Names e.g. : 

List<AggregateResult> myList =  [Select Dealer_Name From SampleObject GROUP BY Dealer_Name ];

Result  :  Dealer1, Dealer2 ,Dealer3

I want to create a map of Each dealer with the remaining dealers.
E.g. : 

Dealer1 => Dealer2 ,Dealer3
Dealer2 => Dealer1,Dealer3
.....and so on

How to do that?
Nayana KNayana K
Set<String> dealerNames = new Set<String>();
Map<String, List<String>> mapDealerToOthers = new Map<String, List<String>>();
for(AggregateResult objAR : [Select Dealer_Name dn, COUNT(Id) cnt From SampleObject GROUP BY Dealer_Name]) {

for(String key: dealerNames) {
	mapDealerToOthers.put(key, new List<String>());
	for(String other: dealerNames) {
		if(other != key) {


Please check if this works