From 45bbda2ca45f6121a59b0ed2b225e8a11826c849 Mon Sep 17 00:00:00 2001
From: ziyi105 <ahziyi@gmail.com>
Date: Fri, 22 Sep 2023 17:15:51 +0800
Subject: [PATCH 1/2] Update main to use streams

---
 src/main/java/se/edu/streamdemo/Main.java | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/main/java/se/edu/streamdemo/Main.java b/src/main/java/se/edu/streamdemo/Main.java
index c41d2d7..ad6bda2 100644
--- a/src/main/java/se/edu/streamdemo/Main.java
+++ b/src/main/java/se/edu/streamdemo/Main.java
@@ -32,13 +32,28 @@ private static int countDeadlines(ArrayList<Task> tasksData) {
         return count;
     }
 
+    private static int countDeadlinesusingStream(ArrayList<Task> tasks) {
+        int count = (int) tasks.stream()
+                        .filter((t) -> t instanceof Deadline)
+                        .count();
+
+        return count;
+    }
+
     public static void printAllData(ArrayList<Task> tasksData) {
+        System.out.println("Using iteration...");
         for (Task t : tasksData) {
             System.out.println(t);
         }
     }
+     public static void printAllDataUsingStream(ArrayList<Task> tasks) {
+         System.out.println("Using streams...");
+        tasks.stream()
+                .forEach(System.out::println);
+     }
 
     public static void printDeadlines(ArrayList<Task> tasksData) {
+        System.out.println("Using iteration...");
         for (Task t : tasksData) {
             if (t instanceof Deadline) {
                 System.out.println(t);
@@ -46,4 +61,11 @@ public static void printDeadlines(ArrayList<Task> tasksData) {
         }
     }
 
+    public static void printDeadlineUsingStream(ArrayList<Task> tasks) {
+        System.out.println("Using streams...");
+        tasks.stream()
+                .filter((t) -> t instanceof Deadline)
+                .forEach(System.out::println);
+    }
+
 }
\ No newline at end of file

From 5627fbb438382026b080a6d1d7c5ebe8a7c72d8f Mon Sep 17 00:00:00 2001
From: ziyi105 <ahziyi@gmail.com>
Date: Fri, 22 Sep 2023 17:42:33 +0800
Subject: [PATCH 2/2] Add code to demonstrate lambdas

---
 src/main/java/se/edu/streamdemo/Main.java | 31 ++++++++++++++++-------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/src/main/java/se/edu/streamdemo/Main.java b/src/main/java/se/edu/streamdemo/Main.java
index ad6bda2..73b27bd 100644
--- a/src/main/java/se/edu/streamdemo/Main.java
+++ b/src/main/java/se/edu/streamdemo/Main.java
@@ -5,6 +5,9 @@
 import se.edu.streamdemo.task.Task;
 
 import java.util.ArrayList;
+import java.util.stream.Collectors;
+
+import static java.util.stream.Collectors.toList;
 
 public class Main {
     public static void main(String[] args) {
@@ -12,11 +15,15 @@ public static void main(String[] args) {
         DataManager dataManager = new DataManager("./data/data.txt");
         ArrayList<Task> tasksData = dataManager.loadData();
 
-        System.out.println("Printing all data ...");
-        printAllData(tasksData);
+//        System.out.println("Printing all data ...");
+//        printAllData(tasksData);
 
-        System.out.println("Printing deadlines ...");
+        System.out.println("Printing deadlines ...(Before sorting)");
         printDeadlines(tasksData);
+        System.out.println("printing deadlines (after sorting)");
+        printDeadlineUsingStreams(tasksData);
+
+        ArrayList<Task> filteredList = filterTaskListBy(tasksData, "11");
 
         System.out.println("Total number of deadlines: " + countDeadlines(tasksData));
 
@@ -40,6 +47,13 @@ private static int countDeadlinesusingStream(ArrayList<Task> tasks) {
         return count;
     }
 
+    public static void printDeadlineUsingStreams(ArrayList<Task> tasks) {
+        tasks.stream()
+                .filter((t) -> t instanceof Deadline)
+                .sorted((t1, t2) -> t1.getDescription().compareToIgnoreCase(t2.getDescription()))
+                .forEach(System.out::println);
+    }
+
     public static void printAllData(ArrayList<Task> tasksData) {
         System.out.println("Using iteration...");
         for (Task t : tasksData) {
@@ -61,11 +75,10 @@ public static void printDeadlines(ArrayList<Task> tasksData) {
         }
     }
 
-    public static void printDeadlineUsingStream(ArrayList<Task> tasks) {
-        System.out.println("Using streams...");
-        tasks.stream()
-                .filter((t) -> t instanceof Deadline)
-                .forEach(System.out::println);
+    public  static ArrayList<Task> filterTaskListBy(ArrayList<Task> tasks, String filterString) {
+        ArrayList<Task> filteredList = (ArrayList<Task>) tasks.stream()
+                .filter((t)-> t.getDescription().contains(filterString))
+                .collect(toList());
+        return filteredList;
     }
-
 }
\ No newline at end of file