Contents
How to add a list to a list in apex?
List Methods 1 add (listElement) 2 addAll (fromList) 3 addAll (fromSet) 4 clear () 5 clone () 6 contains (listElement) 7 equals (list2) 8 get (index) 9 getSObjectType () 10 hashCode ()
How does an INSERT statement in apex work?
An insert statement bulk inserts the list of accounts as an argument. Then, the second account record is updated, the billing city is updated, and the update statement is called to persist the change in the database. // Update account Acme2. // Update the billing city. // Make the update call.
How to add a related record in apex?
Add related records by using a custom external ID field on the parent record. Associating records through the external ID field is an alternative to using the record ID. You can add a related record to another record only if a relationship (such as master-detail or lookup) has been defined for the objects involved.
Which is an example of an instance method in apex?
All are instance methods. Adds an element to the end of the list. Inserts an element into the list at the specified index position. Adds all of the elements in the specified list to the list that calls the method. Both lists must be of the same type. Add all of the elements in specified set to the list that calls the method.
A Set might be what you’re looking for. Define a new Set. Set mySet = new Set (); Use the Set.addAll () method to add all of the List elements to the set. mySet.addAll (myList);.
How is the indexOf method used in apex?
Apex’s List has an indexOf () method, but it only allows searching for an exact match. We can be more flexible. We do the search by filtering to just the Contacts where the LastName is Doe, then returning the first one encountered. If we had used toList () at the end, we could get all matches in a list.
Is there a way to filter a list in apex?
And this generalises: we could filter first to only modify selected records. Apex’s List has an indexOf () method, but it only allows searching for an exact match. We can be more flexible. We do the search by filtering to just the Contacts where the LastName is Doe, then returning the first one encountered.
What do you need to know about list processing in apex?
There are lots of things we do in Apex that are conceptually simple, but require chunks of boilerplate to achieve. As an experienced developer, you recognise the boilerplate, and translate it to the concept as you read the code. But, what if there’s some detail hidden in the boilerplate – would you spot it?