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- type Set = Int => Boolean
- /**
- * Returns a set transformed by applying `f` to each element of `s`.
- */
- def map(s: Set, f: Int => Int): Set = ???
- /**
- * My "reverse" map
- */
- def map(s: Set, f: Int => Int): Set = {
- (i:Int) => s(f(i))
- }
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