scala - muliline string split

Question

I have this:

val msg = \"Preparado para cocinar...\"
val message = msg.splitAt(msg.length()/2)

println(message._1 + \"\\n\" + message._2.trim())
         


        

Answer 1

A reasonably elegant functional solution

def wordWrap(s: String, n: Int) = s.split("\\s").foldLeft(List[String]())
     { (lines, word) =>
        if (lines.isEmpty || lines.head.length + word.length + 1 > n)
          word :: lines
       else
         (lines.head + " " + word) :: lines.tail
     }
    .reverse

wordWrap( "Preparado para cocinar...", 23)
// List(Preparado para, cocinar...)
wordWrap( "Preparado para cocinar...", 5)
// List(Preparado, para, cocinar...)
wordWrap("A quick brown fox jumps over the lazy dog.", 10)
// List(A quick, brown fox, jumps over, the lazy, dog. )

A variant that just checks the empty list once

def wordWrap(s: String, n: Int) = {
    val words = s.split("\\s")
    if (words.isEmpty) Nil
    else
      words.tail.foldLeft(List[String](words.head)){ (lines, word) =>
         if (lines.head.length + word.length + 1 > n) 
           word :: lines
         else
          (lines.head + " " + word) :: lines.tail
      }.reverse
  }