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-rw-r--r--challenge-332/deadmarshal/java/Ch2.java16
1 files changed, 16 insertions, 0 deletions
diff --git a/challenge-332/deadmarshal/java/Ch2.java b/challenge-332/deadmarshal/java/Ch2.java
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+++ b/challenge-332/deadmarshal/java/Ch2.java
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+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);
+ }
+}