Coverage Summary for Class: TextKt (dev.suresh.lang)

 package dev.suresh.lang
 
 import java.util.*
 
 /**
  * https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/lang/Character.html#unicode
  * https://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries
  * https://docs.oracle.com/javase/tutorial/i18n/text/char.html
  */
 fun main() {
 
   // String that contains the US flag and a grapheme for a 4-member-family.
   val text = "🇺🇸👨‍👩‍👧‍👦"
 
   println(
       """
       String : $text
       String Length : ${text.length}  (Number of Unicode code units, characters as fixed-width 16-bit entities)
       Code Point Size : ${text.codePoints().count()} (Any surrogate pairs encountered in the sequence are combined)
       UTF-8 ByteArray Size : ${text.encodeToByteArray().size}
       """
           .trimIndent())
 
   val codePoints = text.codePoints().toArray()
   for (i in codePoints.indices) {
     println(HexFormat.of().withPrefix("0x").toHexDigits(codePoints[i]))
     println(String(codePoints, 0, i + 1))
   }
 
   println("---CodePoint to String---")
   println(codePoints.codePointsToString())
   println(codePoints.codePointsToString(","))
   println("--------------------------")
 
   // val fmt =
 
   //  val bit = BreakIterator.getCharacterInstance()
   //  // bb.set
   //  while (bb.next() != BreakIterator.DONE) {
   //    println(Character.toString(bb.current()))
   //  }
   //
   //  println("----")
   //  "🇺🇸👨‍👩‍👧‍👦".codePoints().forEach { String(IntArray(it), 0, 1) }
   //  println("----")
   //
   //  "🇺🇸👨‍👩‍👧‍👦".codePoints().mapToObj(Character::toString).forEach { println(it) }
 }
 
 fun IntArray.codePointsToString(): String = buildString {
   for (cp in this@codePointsToString) {
     appendCodePoint(cp)
   }
 }
 
 fun IntArray.codePointsToString(separator: String = "") =
     joinToString(separator) { Character.toString(it) }