Hands on the Combinations class in Apache Commons Math

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

%classpath add mvn org.apache.commons commons-math3 3.6.1

import org.apache.commons.math3.util.Combinations
import scala.collection.JavaConverters._

import org.apache.commons.math3.util.Combinations
import scala.collection.JavaConverters._

val it = new Combinations(6, 2).iterator()
it.foreach(System.out.println)

<console>:97: error: value foreach is not a member of java.util.Iterator[Array[Int]]
       it.foreach(System.out.println)
          ^

val it = new Combinations(5, 3).iterator()
while(it.hasNext()){
    System.out.print(it.next().mkString(" ") + "\n")
}

null