object NumericExtractor {
/**
* Removes all non-numeric characters from a string, returning a new string
* containing only numeric digits (0-9).
*
* @param input The source string containing alphanumeric and special characters.
* @return A new String containing only digits.
* @throws IllegalArgumentException if the input string is null.
*/
def removeNonNumeric(input: String): String = {
// Guard clause: input cannot be null
require(input != null, "Input string cannot be null.")
// Filter the characters keeping only digits using Scala's built-in isDigit method
input.filter(_.isDigit)
}
def main(args: Array[String]): Unit = {
// Test string provided
val text = "123XYZ +9982-programming 10000000000001language"
// Process the string
val cleanedText = removeNonNumeric(text)
// Output results
println(s"Original: $text")
println(s"Cleaned: $cleanedText")
}
}
/*
run:
Original: 123XYZ +9982-programming 10000000000001language
Cleaned: 123998210000000000001
*/
