Copy List of sObject records to Map in apex

Sometimes, we need to copy a list of sObject records into Map of, record id as a key and record as a value. here is a simple solution to how to do that instead of looping through list and add one by one record to map.

Copy List to Map using for Loop:

// query account records
List<Account> acLst = [select id, name from Account limit 100];
// create a map
Map<Id, Account> acMap = New Map<Id, Account>();

// loop throught and add one by one record to map
for(Account ac: acLst){
	acMap.put(ac.id, ac);
}

Copy List to Map quick way:

// query account records
List<Account> acLst = [select id, name from Account limit 100];
// create a map and copy all records 
Map<Id, Account> acMap = New Map<Id, Account>(acLst);