Add one more example

aplotnikov · aplotnikov · commit ce0ced6e0ac8 · 2019-01-20T17:29:52.000+01:00
diff --git a/src/main/java/io/github/aplotnikov/java_8_misuses/stream/collectors/TrueFunctionalApproach.java b/src/main/java/io/github/aplotnikov/java_8_misuses/stream/collectors/TrueFunctionalApproach.java
@@ -1,12 +1,14 @@
 package io.github.aplotnikov.java_8_misuses.stream.collectors;
 
 import io.github.aplotnikov.java_8_misuses.domain.Client;
+import io.github.aplotnikov.java_8_misuses.utils.Annotations.Bad;
 
 import java.util.List;
 
 import static io.github.aplotnikov.java_8_misuses.utils.Annotations.Good;
 import static io.github.aplotnikov.java_8_misuses.utils.Annotations.Ugly;
 import static java.util.Comparator.comparingInt;
+import static java.util.function.BinaryOperator.maxBy;
 
 class TrueFunctionalApproach {
     @Ugly
@@ -48,6 +50,15 @@ Client findTheOldestClient(List<Client> clients) {
         }
     }
 
+    @Bad
+    class StreamsWithReductionAndMax {
+        Client findTheOldestClient(List<Client> clients) {
+            return clients.stream()
+                          .reduce(maxBy(comparingInt(Client::getAge)))
+                          .orElse(null);
+        }
+    }
+
     @Good
     class MaxWithComparator {
         Client findTheOldestClient(List<Client> clients) {
