Question

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

Answer 1

fun extractContentBetweenTags(str: String, tagName: String): String? {
    // Build a regex pattern using the specified tag name
    val pattern = "<$tagName>(.*?)</$tagName>".toRegex()

    // Use regex to find the content
    val match = pattern.find(str)
    
    return match?.groups?.get(1)?.value // Return the content inside the tags or null if no match is found
}

fun main() {
    val str = "abcd <tag>efg hijk lmnop</tag> qrst uvwxyz"

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

    if (content != null && content.isNotEmpty()) {
        println("Extracted content: $content")
    } else {
        println("No matching tags found.")
    }
}

   
      
/*
run:
   
Extracted content: efg hijk lmnop
  
*/

 

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