Set in Salesforce

Set

1. It doesn’t allow duplicates.
2. It maintains dictionary order.
3. Set maintains hash code mechanism.
4. It allows only one null value.

Syntax

set<Datatype> variable name = new set<Datatype>();

Methods

1. Add(Element);
2. addAll(list/set s);
3. contains(Element);
4. containsAll(set/list s);
5. size();
6. clear();
7. remove(Element);