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Update Sets.scala #146

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3 changes: 3 additions & 0 deletions src/main/scala/stdlib/Sets.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -83,10 +83,13 @@ object Sets extends FlatSpec with Matchers with org.scalaexercises.definitions.S
}

/** Set elements can be removed with a tuple:
* (note -- unary '-' on a tuple with more than one value is deprecated from scala 2.13.0)
*/
def tupleRemovingSets(res0: Boolean, res1: Boolean, res2: Int) {
val mySet = Set("Michigan", "Ohio", "Wisconsin", "Iowa")
val aNewSet = mySet - ("Michigan", "Ohio") // Notice: single '-' operator for tuples
// the above operation will work, but result in a warning:
// warning: method - in trait SetOps is deprecated (since 2.13.0): Use &- with an explicit collection argument instead of - with varargs

aNewSet.contains("Michigan") should be(res0)
aNewSet.contains("Wisconsin") should be(res1)
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