List.add( value || 'default value')?

Question

After querying for Account sObjects, I'm adding all the fields into a List. The problem is that some Account sObjects have certain fields and others do not. While adding the fields to my list, I'd like to be able to add field if it exists OR add a default string.

Let's go through the example.

My query:

List<Account> accountQuery = [SELECT name, (SELECT name, id FROM Contacts) FROM Account];

My map:

Map<String, List<String>> Result = new Map<String, List<String>>();

Iterating through the queryResult and saving the values:

For(Account i : accountQuery){
    String[] temp = new list<string>();
    temp.add(i.name)
    //Now loop through contacts subquery
    if(!i.contacts.isEmpty()){
        for(contact j : i.Contacts){
            temp.add(j.name || 'No Contact Name Associated'); //Doesn't work
            temp.add(j.id || 'No Contact Id Associated');
        }
    }
    else{
        temp.add('No Contact Name Associated');
        temp.add('No Contact Id Associated');
    }
};

How can I achieve this temp.add(value || 'default value')?

Thank you!

Answer 1

Try using something like this

for(contact j : i.Contacts){
     string tempName = (j.Name == null) ? 'No Contact Name Associated' : j.Name;
     temp.add(tempName);
}

This is know as a ternary conditional statement.

From the docs.....

There is also a ternary conditional operation, which acts as short hand for an if-then-else statement. The syntax is as follows:

x ? y : z

and can be read as: if x, a Boolean, is true, then the result is y; otherwise it is z. Execute the following:

Boolean isIt = true; String x = 'You are ' + (isIt ? 'great' : 'small');

System.debug(x);

You can see the full doc here

EDIT

As pointed out by @sfdcfox, you can actually do this without the added step of an intermediary variable. This is what the code would look like

for(contact j : i.Contacts){
     temp.add((j.Name == null) ? 'No Contact Name Associated' : j.Name);
}