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my.invs.jusexton

Number of numbers

Code
Diff
  • import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;

class Solution {
    public static String numberOfNumbers(int value) {
        String delimiter = getDelimiterFor(value);
        
        return IntStream.rangeClosed(0, Math.abs(value))
                .mapToObj(Solution::repeatByItself)
                .filter(Solution::notBlank)
                .collect(Collectors.joining(delimiter));
    }
    
    private static String getDelimiterFor(int value){
        return value > 0 ? "-" : "+";
    }
    
    private static String repeatByItself(int i){
        return String.valueOf(i).repeat(i);
    }
    
    private static boolean notBlank(String s){
        return !s.isBlank();
    }
}
    • import java.util.stream.Collectors;
    • import java.util.stream.IntStream;
    • import java.util.stream.Stream;
    • class Solution {
    • public static String numberOfNumbers(final int value) {
    • if (value == 0) {
    • return "";
    • }
    • final String delimiter = value > 0 ? "-" : "+";
    • return IntStream.rangeClosed(1, Math.abs(value))
    • .mapToObj(n -> new String(new char[n]).replace("\0", String.valueOf(n)))
    • public static String numberOfNumbers(int value) {
    • String delimiter = getDelimiterFor(value);
    • return IntStream.rangeClosed(0, Math.abs(value))
    • .mapToObj(Solution::repeatByItself)
    • .filter(Solution::notBlank)
    • .collect(Collectors.joining(delimiter));
    • }
    • private static String getDelimiterFor(int value){
    • return value > 0 ? "-" : "+";
    • }
    • private static String repeatByItself(int i){
    • return String.valueOf(i).repeat(i);
    • }
    • private static boolean notBlank(String s){
    • return !s.isBlank();
    • }
    • }