Try it yourself:
| @1 |
setUnion([1, 2, 3, 4], [3, 4, 5, 6])
|
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| @2 |
setUnion([[1, 2], [3, 4]], [[3, 4], [5, 6]])
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setUnion(A, B) returns every distinct member found in either set. It is the natural operation for merging tags, permissions, or candidate lists.
The union of {1,2} and {2,3} is {1,2,3}. Use setIntersect for only common members and setSymDifference for only non-shared members.
Union removes duplicate membership. Use concat when duplicates and source order must remain, and setSize to count the merged distinct result.
Start with one of the editable examples above, then replace its arguments with your own values. Keeping the function on a separate calculator line makes the input and result easy to compare. For a longer workflow, assign the result to a variable or reference that line in the next expression.
Check the shown signature before adding optional arguments, and use the related-function links to compare operations with similar purposes.