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- is any set of values.
- This function used to remove duplicate from the given set of values.
- In , is any set of values.
- The Nub function removes duplicate elements from a list.
- The name NUB means "essence".
- In particular, it keeps only the first occurrence of each element.
- It is a special case to do the equality test.
- NUB(["good","bad","clever","good"]) = good bad clever
- NUB([12,14,12,45,12,19,12])= 12 14 19 45