Question

How to extract a substring between two tags using RegEx in Scala

Answer 1

import scala.util.matching.Regex

object Program {
  def extractContentBetweenTags(str: String, tagName: String): Option[String] = {
    // Build a regex pattern using the specified tag name
    val pattern = s"<$tagName>(.*?)</$tagName>"
    val regex = new Regex(pattern)

    // Find the first match
    regex.findFirstMatchIn(str) match {
      case Some(matched) => Some(matched.group(1)) // Return the content inside the tags
      case None => None // Return None if no match is found
    }
  }

  def main(args: Array[String]): Unit = {
    val str = "abcd <tag>efg hijk lmnop</tag> qrst uvwxyz"

    // Call the function to extract the substring
    val content = extractContentBetweenTags(str, "tag")

    content match {
      case Some(value) => println(s"Extracted content: $value")
      case None => println("No matching tags found.")
    }
  }
}


  
     
/*
run:
  
Extracted content: efg hijk lmnop

*/

 

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