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A Set's node interface provides the following functionality for developers working in Blueprints: adding items to a Set, removing items from a Set, clearing Sets, looking up items contained in a Set, and checking a Set's length. The following guide provides additional information about the various nodes that make-up Blueprint Sets in Unreal Engine 4 (UE4).
| Node | Description |
|---|---|
| Add (Set Nodes) | Adds an item to a Set. |
| Add Items | Adds items from a specified Array to a Set. |
| Clear (Set Nodes) | Clears all items from a Set. |
| Contains Item | Checks to see if a Set contains an item. |
| Difference | Takes the relative difference of two Sets, assigning the difference to a resultant Set. |
| Intersection | Takes the intersection of two Sets, assigning the intersection to a resultant Set. |
| Length (Sets) | Gets the number of items (length) in a Set. |
| Remove (Set Nodes) | Removes an item from a Set. |
| Remove Items | Removes items specified in an Array from a Set. |
| To Array | Copies a Set into an Array. |
| Union | Performs a union of two Sets, assigning the union to a resultant Set. |