Prag Kata 5 - bloom filter

import scala.io.Source;
import scala.collection.mutable;

class Bloom( file : String ){
	private val words = mutable.Map.empty[Int, Int];
	def initialize() : Unit = {
		populateBitmap();
	}
	
	def populateBitmap() : Unit = {
		for( line <- Source.fromFile(file).getLines )
			words(line.trim().toLowerCase().hashCode()) = 1;
	}	
	
	def testWord(word:String) : Boolean = {
		return words.contains(word.toLowerCase().hashCode());
	}
}

val b = new Bloom("/usr/share/dict/words");
b.initialize();
println( b.testWord("hello") );