A Groovy solution for Project Euler - Problem 30

euler30.groovy

Integer.metaClass.toDigits = {
  value.toString().toList().collect { it as Integer }
}

Integer.metaClass.digitsToThePowerOf = { power -> 
  toDigits().collect { it ** power }
}

(1000..200000).inject 0, { sum, number -> 
  sumOfDigitsToTheFifthPower = number.digitsToThePowerOf(5).sum()
  
  sum += (number == sumOfDigitsToTheFifthPower) ? number : 0  
}