diff options
Diffstat (limited to 'challenge-332/deadmarshal/java/Ch2.java')
| -rw-r--r-- | challenge-332/deadmarshal/java/Ch2.java | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/challenge-332/deadmarshal/java/Ch2.java b/challenge-332/deadmarshal/java/Ch2.java new file mode 100644 index 0000000000..ba0eeb0fa3 --- /dev/null +++ b/challenge-332/deadmarshal/java/Ch2.java @@ -0,0 +1,16 @@ +import java.util.HashMap; +import java.util.Map; + +public class Ch2 { + public static void main(String[] args) { + System.out.println(odd_letters("weekly")); + System.out.println(odd_letters("perl")); + System.out.println(odd_letters("challenge")); + } + + private static boolean odd_letters(String s) { + Map<Character, Integer> h = new HashMap<>(); + for (var c : s.toCharArray()) h.merge(c, 1, Integer::sum); + return h.values().stream().allMatch(a -> a % 2 != 0); + } +} |
