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Steven Lim 4Steven Lim 4 

Question on this bit of APEX syntax

for(Account a : [SELECT Id, Most_Recently_Created_Opportunity_Name__c 
                     FROM Account 
                     WHERE Id IN :accountIdOpportunityMap.keySet()]){
        a.Most_Recently_Created_Opportunity_Name__c = 
                               ((Opportunity) accountIdOpportunityMap.get(a.Id)).Name;
        accounts.add(a);
    }

Hello, there's a bit of APEX syntax I keep running into but I am having trouble comprehending. What does it mean to have [(Opportunity)] in parenthesis in front of the Map instance accountIdOpportunityMap.get(a.Id)? The line I am referencing is line 5.

What type of operation is this? Is there a name for this type of code in parenthesis I can read up on? Thanks!
Best Answer chosen by Steven Lim 4
Amit Chaudhary 8Amit Chaudhary 8
It look you have a map "accountIdOpportunityMap" which contain AccountID wise Opportunity Record.
In below line

 a.Most_Recently_Created_Opportunity_Name__c =  ((Opportunity) accountIdOpportunityMap.get(a.Id)).Name;

Base on AccountID you are getting Opportunity record from accountIdOpportunityMap and also doing type casting into Opportunity object