How to get a List Element of a Map

Question

I have a map Map<Id, list<Boolean>> mapOfIdAndListBoolean = new Map<Id, list<Boolean>>(); I think I can get the whole list by using mapOfIdAndListBoolean .get(order.AccountId). Would I get the first element of the list by using mapOfIdAndListBoolean .get(order.AccountId)[0]?

Answer 1

Yes you will get the first element of the List.

Try below code for understanding in anonymous window.

Map<String, list<Boolean>> mapOfIdAndListBoolean = new Map<String, list<Boolean>>();

mapOfIdAndListBoolean.put('testStr',new List<Boolean>{true,false,true});
system.debug(mapOfIdAndListBoolean);
Boolean value = mapOfIdAndListBoolean.get('testStr')[0];
system.debug(value);