setDifference
setDifference(set1, set2)
Create the difference of two (multi)sets: every element of set1, that is not the element of set2. Multi-dimension arrays will be converted to single-dimension arrays before the operation.
Try it yourself:
| $1 | setDifference([1, 2, 3, 4], [3, 4, 5, 6])
| |
| $2 | setDifference([[1, 2], [3, 4]], [[3, 4], [5, 6]])
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