Question

How to replace consecutive characters with only one using RegEx in Kotlin

Answer 1

fun removeConsecutiveDuplicates(input: String): String {
    // Matches any character (.) followed by itself one or more times (\1+)
    val pattern = Regex("(.)\\1+")

    // Replaces with the first captured group
    return pattern.replace(input, "$1")
}

fun main() {
    val input = "aaaabbbccdddddd"
    val modified = removeConsecutiveDuplicates(input)

    println("Original: $input")
    println("Modified: $modified")
}

 
  
/*
run:
  
Original: aaaabbbccdddddd
Modified: abcd

*/

 

70+ SQL courses for beginners and professionals