How to concatenate sets in Scala

Question

Can any provide an example how to concatenate sets in Scala?

Answer 1

Hey,

Yes, there are two ways of doing this you can follow this example provided below.

Lets us take a new set first:

scala> var s1=Set(7,9,8,9)

s1: scala.collection.immutable.Set[Int] = Set(7, 9, 8)

• Using ++ Operator 

​scala> s++s1

res3: scala.collection.immutable.Set[Int] = Set(1, 9, 7, 3, 8, 4)

scala> s++s1

res4: scala.collection.immutable.Set[Int] = Set(1, 9, 7, 3, 8, 4)

scala> s1++s

res5: scala.collection.immutable.Set[Int] = Set(1, 9, 7, 3, 8, 4)

• Using Set.++() Method

You can call the ++() method to either set and pass the other to it.

scala> s.++(s1)

res6: scala.collection.immutable.Set[Int] = Set(1, 9, 7, 3, 8, 4)

scala> s1.++(s)

res7: scala.collection.immutable.Set[Int] = Set(1, 9, 7, 3, 8, 4)

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