How to dynamically reference custom field? [duplicate]

Question

I am new to Salesforce, and programming. Is there a way to reference CustomObject__c when adding to list, without hardcoding the name of the field (customObject__c)? Example:

If(Name ='123'){
updateListOpp.add(new Opportunity(customObject__c = null);
}

I have multiple custom objects that need to be added to a list, So I just wanted to know if there is a better way, instead of having to hardcode each custom object and having multiple conditional statements.

Answer 1

SObject behaves like a map, meaning you can use .put() method like this.

List<SObject> sObjects = new List<SObject>();

Opportunity o = new Opportunity();
o.put('Name', 'asd');
sObjects.add(o);

Lead l = new Lead();
l.put('Email', 'asd@asd.asd');
sObjects.add(l);

System.debug(sObjects);