Joshua joshdaquino

This is a quick guide to Kotlin programming language. The previous part of this guide is here

#Object Oriented

fun main(args : Array<String>) {
  class local (val x : Int)
  
  val y = local(10)
 println("${y.x}")

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.

	private val HEX_CHARS = "0123456789ABCDEF".toCharArray()

	fun ByteArray.toHex() : String{
	val result = StringBuffer()

	forEach {
	val octet = it.toInt()
	val firstIndex = (octet and 0xF0).ushr(4)
	val secondIndex = octet and 0x0F
	result.append(HEX_CHARS[firstIndex])