top letters

gistfile1.scala

import scala.util.matching.Regex
import sys.process._
 
val str     =  "curl http://www.giwersworld.org/computers/linux/common-words.phtml" !!
val pattern = "<pre>[A-Z\n]*</pre>".r 
val words   = pattern findFirstIn str
words.mkString
     .replace("\n", "")
     .groupBy(_.toChar)
     .mapValues(_.size)
     .toList
     .sortBy { _._2 }
     .reverse
     .take(10)
     .map { _._1 }