perlの正式版のバージョンの一覧を作る

gistfile1.scala

import scala.io.Source

object perlVersions extends App {

    val perlVersionList = parsePerlVersions("http://www.cpan.org/src/5.0/")

    perlVersionList.foreach(println)

    def parsePerlVersions(url: String): List[String] = {
        val html   = Source.fromURL(url).mkString
        val regexp = """<a href="perl-(5.(\d{1,2}).\d).tar.gz">.*?</a>""".r

        for (   m <- regexp.findAllMatchIn(html).toList;
                major = m.group(2)
                if major.toInt % 2 == 0
                )
            yield m.group(1).toString
    }
}