Take first three letters in the string

Question

I need to retrieve first three letters

val s ="abc"
val t = s.substring(0,2).equals("ab")
case class Test(id :String)

if(t){
  Test("found")
 }else{
   None
 }

Is there a efficient way to code for the above logic

Answer 1

"abc".take(2) match {
  case "ab" => Test("found")
  case _ => None
}

for String, you can use take to get chars like Seq, and it's more safe than substring to avoid StringIndexOutOfBoundsException exception.

and since you are returning None when not match, Test("found") Shouldn't be Some(Test("found"))?