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// Scramble from files/stdin to stdout
fun main(args: Array<String>) {

  // Collect readers from args/stdin
  val readers =
    if (args.isNotEmpty())
      args.map { File(it).reader() }
    else
      // in: quoted because reserved

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wscrambler.scrambleWords("Hey there!")

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package wscrambler

object WordScrambler {
  // Regex compiled only once:
  // at object initialization.
  // Inaccessible to others,
  // even in the same package.
  private val WORD_REGEX =
    """\p{IsLatin}(\p{IsLatin})\1*(?!\1)\p{IsLatin}\p{IsLatin}+"""

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// Nullable constructor arg w/default
class Numberer(pattern: String? = null) {

  companion object {
    // Public constant
    const val DEF_PATTERN = "000,000"
  }

  // Private field w/fallback value (?:)

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package wscrambler

object WordScrambler {
  private val WORD_REGEX =
    """\p{IsLatin}(\p{IsLatin})\1*(?!\1)\p{IsLatin}\p{IsLatin}+""".toRegex()

  @JvmStatic // JVM static method
  // CLI FQN: wscrambler.Scrambler
  fun main(args: Array<String>) {

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final var wordRegex =
  Pattern.compile("\\p{InLatin}{4,}")

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val wordRegex =
  """\p{InLatin}{4,}""".toRegex()

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fun String.toRegex(): Regex {
    return Regex(Pattern.compile(this))
}

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fun String.toRegex() =
  Regex(Pattern.compile(this))

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// Two backslashes
"""\\p{InLatin}{4,}"""