Scala example source code file (ReplacementMatching.scala)

This example Scala source code file (ReplacementMatching.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

and, and, array, array, date, date, none, replacing, replacing, some, test

The Scala ReplacementMatching.scala source code

import util.matching._




object Test {
  
  def main(args: Array[String]) {
    replacementMatching
    groupsMatching
  }
  
  def replacementMatching {
    val regex = """\$\{(.+?)\}""".r
    val replaced = regex.replaceAllIn("Replacing: ${main}. And another method: ${foo}.",
        (m: util.matching.Regex.Match) => {
      val identifier = m.group(1)
      identifier
    })
    assert(replaced == "Replacing: main. And another method: foo.")
    
    val regex3 = """\$\{(.+?)\}""".r
    val replaced3 = regex3.replaceSomeIn("Replacing: ${main}. And another: ${foo}.", (m: util.matching.Regex.Match) => {
      val id = m.group(1)
      if (id.startsWith("m")) Some(id) else None
    })
    assert(replaced3 == "Replacing: main. And another: ${foo}.")
  }
  
  def groupsMatching {
    val Date = """(\d+)/(\d+)/(\d+)""".r
    for (Regex.Groups(a, b, c) <- Date findFirstMatchIn "1/1/2001 marks the start of the millenium. 31/12/2000 doesn't.") {
      assert(a == "1")
      assert(b == "1")
      assert(c == "2001")
    }
    for (Regex.Groups(a, b, c) <- (Date findAllIn "1/1/2001 marks the start of the millenium. 31/12/2000 doesn't.").matchData) {
      assert(a == "1" || a == "31")
      assert(b == "1" || b == "12")
      assert(c == "2001" || c == "2000")
    }
  }
  
}