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object Test extends dotty.runtime.LegacyApp {
import util.matching._
import Regex._
val r = "(\\d+)".r
val q = """(\d)""".r
val ns = List("1,2","x","3,4")
val u = r.unanchored
val is = ns collect { case u(x) => x } map { case r(x) => x }
println(is)
// Match from same pattern
val js = (ns map { u findFirstMatchIn _ }).flatten map { case r(x) => x }
println(js)
// Match not from same pattern
val ks = (ns map { q findFirstMatchIn _ }).flatten map { case r(x) => x }
println(ks)
val t = "Last modified 2011-07-15"
val p1 = """(\d\d\d\d)-(\d\d)-(\d\d)""".r
val y1: Option[String] = for {
p1(year, month, day) <- p1 findFirstIn t
} yield year
val y2: Option[String] = for {
p1(year, month, day) <- p1 findFirstMatchIn t
} yield year
println(s"$y1 $y2")
}
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