A Scala script that reads a hex string from the system clipboard and compute the length of it

A-Read-Me.md

Intro

This is a Scala script that reads a hex string from the system clipboard and compute the length of it.

Use case

It's mainly a utility for blob. Our data is stored in Cassandra (or ScyllaDB) as blob, but sometimes we need to analyze the data.

Usage

1. Install scala-cli in your system.
2. Copy the hex string to your clipboard.
3. Run the script via scala-cli hex-length.scala.

hex-length.scala

//> using jvm graalvm:21
//> using dep "commons-codec:commons-codec:1.17.1"

import java.awt._
import java.awt.datatransfer._

import org.apache.commons.codec.binary.Hex

@main def main = {
  val c = Toolkit.getDefaultToolkit.getSystemClipboard
  // Get data stored in the clipboard that is in the form of a string (text)
  val text = c.getData(DataFlavor.stringFlavor).toString

  val bytes = Hex.decodeHex(text.substring(2))
  println(bytes.length)
}