advancedStringReplacements

Replace all numbers with that number of '?':

java like:

import java.util.regex.Pattern
    val NKasString = "?"
    val p = Pattern.compile("[0-9]+")
    val m = p.matcher("\"a2a12a2\"")
    val sb = new StringBuffer()
    while (m.find()) {
      val found = m.group()
      m.appendReplacement(sb, NKasString * found.toInt)
    }
    m.appendTail(sb)
    println(sb.toString())
    
scala like:

println(
      "[0-9]+".r.replaceAllIn(
        "\"a2a12a2\"", m => NKasString * m.group(0).toInt)
    )