Copy most of the field values from one object to the other

Question

So i have two copies of an object and i want to copy over most but not all of the fields from one to the other. Luckily, i use naming conventions to help, all the fields i need to copy over start with Assets or Banking so this is what im playing with

Map<String, Schema.SobjectField> MeetingFields = Schema.SObjectType.Meeting__c.fields.getMap();

for(String key : MeetingFields.keySet()) {

   if (key.startsWith('Assets') || key.startsWith('Banking')  ) {
       meeting[key] = prevMeeting.get(key);
   }

}

the two objects, meeting and prevMeeting are both Meeting__c sObjects..

It does loop through all the fields and key is fine but how do i get the key from each object to do the copy?

I tried

meeting[key] = prevMeeting.get(key);
meeting.get(key) = prevMeeting.get(key);

Is there an easier way to do this?

Answer 1

See the SObject.put() method.

Map<String, Schema.SobjectField> MeetingFields = Schema.SObjectType.Meeting__c.fields.getMap();

for(String key : MeetingFields.keySet()) {

   if (key.startsWith('Assets') || key.startsWith('Banking')  ) {
       meeting.put(key, prevMeeting.get(key));
   }

}