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object Main extends App {
	// your code goes here
	def m:Map[Int,String] = Map(6->"pref 1",4 -> "pref 2")
	m.foldLeft(0)={case (a, (k, v)) => 
    	if(k == 2){
    		a + (k, "Better",v)
    	}
    	a
    }
}

/opt/scala/bin/scalac: line 50: /dev/null: Permission denied
Main.scala:4: error: missing arguments for method foldLeft in trait TraversableOnce;
follow this method with `_' if you want to treat it as a partially applied function
	m.foldLeft(0)={case (a, (k, v)) => 
          ^
one error found
spoj: The program compiled successfully, but Main.class was not found.
      Class Main should contain method: def main(args: Array[String]).

Standard output is empty