how use functional programming in scala function

Solution 1:

String is effectively a collection of char's so you can treat it like one. For example:

val result = text
  .map(c => if (voyelle.contains(c)) "av" + c else c.toString)
  .mkString

Solution 2:

How about

   text.replaceAll("([aeiou])", "av$1")

Solution 3:

You can just use flatMap

def translate(text: String): String = {
  val vowels = Set('a', 'e', 'i', 'o', 'u')
  text.trim.toLowerCase.flatMap { c =>
    if (vowels.contains(c)) s"av${c}"
    else c.toString
  }
}

code running here.

how use functional programming in scala function

Solution 1:

Solution 2:

Solution 3:

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