codewars #41 Dashatize it (6kyu)

#41 Dashatize it

 

 

Given a number, return a string with dash'-'marks before and after each odd integer, but do not begin or end the string with a dash mark.

 

Ex:
dashatize(274) -> '2-7-4'
dashatize(6815) -> '68-1-5'

 

 

import java.util.Arrays;
import java.util.stream.Collectors;

public class Solution {

    public static String dashatize(int num) {
    	return Arrays.stream(String.valueOf(Math.abs((long)num)).split(""))
    		   .map(x -> Integer.valueOf(x) % 2 == 0 ? x : "-"+x+"-")
    		   .collect(Collectors.joining(""))
    		   .replaceAll("-{2}", "-")
    		   .replaceAll("^-|-$", "");
    }

}