//
// program to find words that can be formed from list of letters
//
// command line argument:  name of file with list of words
//
import scala.io.Source

if (args.length < 1) { 
  println("need file as command-line argument")
  sys.exit()
}

println("your Scrabble letters (no spaces):")
val letters = readLine

println("words that can be formed:")
val wordfile = Source.fromFile(args(0))
for (wordInFile <- wordfile.getLines) {
  if (canMakeThisWord(wordInFile, letters))
    println(wordInFile)
}
wordfile.close

// say whether the word can be formed with the given letters
// not as efficient as it could be but gets the job done
def canMakeThisWord(wordInFile : String, letters : String) : Boolean = {
  var result = true
  for (ch <- wordInFile.toArray) {
    if (wordInFile.count(_ == ch) > letters.count(_ == ch))
      result = false
  }
  result
}