Question

I need to guarantee a string only contains allowed symbols. Now I do it this way:

def isCorrect(s: String, allowedChars: String): Boolean = {
  s.distinct.foreach(c => {
    if (!allowedChars.contains(c))
      return false
  })

  true
}

Needless to say this does not look too pretty. Is there a better, more functional way to do this?

Answer 1

I dont know if it is the most functional way to do it, but you can do this:

def isCorrect(s: String, allowedChars: String): Boolean = {
    return s.distinct.forall(c => allowedChars.contains(c))
}

the distinct isnt really necessary.