Salesforce Apex Master Class (Ep. 19) - What are Maps in Apex? 

Yes, you can absolutely do that too! A key in a map can also be tied to a value that is a collection type!

@@CodingWithTheForce Thanks Matt... just to confirm , can the key value also be a collection type? I guess not.... it has to be String, INteger or SObject record...?

When its time please do a video on how this works....and hopefully with a Salesforce use case... thanks for responding so fast (did not expect that).... I feel privileged... especially with these basic questions...

@@pedroprada1 It would work like this : Map or Map for example

intellij