Multiple ways to iterate over a Set

Category : Scala | Sub Category : Scala Programs | By Prasad Bonam Last updated: 2023-10-01 01:56:25 Viewed : 262

In Scala, you can iterate over a Set using various methods, including for loops, foreach, map, and more. Here are multiple ways to iterate over a Set in Scala with output:

1. Using a For-Each Loop:

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val mySet = Set(1, 2, 3, 4, 5)
for (item <- mySet) {
  println(item)
}

2. Using the foreach Method:

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val mySet = Set(1, 2, 3, 4, 5)
mySet.foreach(item => println(item))

3. Using map and foreach (functional approach):

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val mySet = Set(1, 2, 3, 4, 5)
mySet.map(item => println(item))

4. Using a While Loop and an Iterator:

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val mySet = Set(1, 2, 3, 4, 5)
val iterator = mySet.iterator
while (iterator.hasNext) {
  val item = iterator.next()
  println(item)
}

5. Using a for comprehension (functional approach):

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val mySet = Set(1, 2, 3, 4, 5)
for {
  item <- mySet
} println(item)

6. Using a Tail-Recursive Function:

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import scala.annotation.tailrec

val mySet = Set(1, 2, 3, 4, 5)

@tailrec
def printSet(set: Set[Int]): Unit = {
  if (set.nonEmpty) {
    val (item, remainingSet) = (set.head, set.tail)
    println(item)
    printSet(remainingSet)
  }
}

printSet(mySet)

These are some common ways to iterate over a Set in Scala, each with its own syntax and style. You can choose the one that best fits your coding preferences and the specific requirements of your application.