Challenge 58.

Stream intermediate operations.
peek vs forEach

src/main/java/challenge51_60/Challenge_58.java

@@ -0,0 +1,26 @@
+package challenge51_60;
+
+import java.util.List;
+import java.util.stream.Stream;
+
+/**
+ *  unlike forEach, peek is an intermediate operation.
+ *  peek return a stream of T, forEach return void, both
+ *  receive a consumer lambda expression as an input argument.
+ *
+ */
+public class Challenge_58 {
+
+    public static void main( String[] args ) {
+
+        List<String> list = List.of("Yoda", "Luke", "Anakin", "Obi Wan", "Luke");
+        list.stream()
+                .skip(1)
+                .filter(jedi->jedi.startsWith("Lu"))
+                .limit(4)
+                .distinct()
+                .map(String::length)
+                .flatMap(jedi-> Stream.of(jedi))
+                .peek(System.out::println);
+    }
+}