diff --git a/Other Projects/Animating Views And Transitions/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Animating Views And Transitions/Complete/Landmarks/Landmarks/Models/UserData.swift
index efe0bee..afc2cca 100755
--- a/Other Projects/Animating Views And Transitions/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Animating Views And Transitions/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,17 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var showFavoritesOnly = false
 
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }
diff --git a/Other Projects/Combine using GitHub API/SwiftUI-Combine-Example/SearchUserViewModel.swift b/Other Projects/Combine using GitHub API/SwiftUI-Combine-Example/SearchUserViewModel.swift
index f1df886..aedb621 100755
--- a/Other Projects/Combine using GitHub API/SwiftUI-Combine-Example/SearchUserViewModel.swift	
+++ b/Other Projects/Combine using GitHub API/SwiftUI-Combine-Example/SearchUserViewModel.swift	
@@ -2,23 +2,11 @@ import SwiftUI
 import Combine
 
 final class SearchUserViewModel: ObservableObject {
-    var objectWillChange = PassthroughSubject<SearchUserViewModel, Never>()
+    @Published private(set) var users = [User]()
 
-    private(set) var users = [User]() {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published private(set) var userImages = [User: UIImage]()
 
-    private(set) var userImages = [User: UIImage]() {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
-
-    private var cancellable: Cancellable? {
-        didSet { oldValue?.cancel() }
-    }
+    @Published private var cancellable: Cancellable?
 
     func search(name: String) {
         guard !name.isEmpty else {
diff --git a/Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Models/UserData.swift
index efe0bee..afc2cca 100755
--- a/Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Composing Complex Interfaces/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,17 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var showFavoritesOnly = false
 
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }
diff --git a/Other Projects/Drawing Paths And Shapes/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Drawing Paths And Shapes/Complete/Landmarks/Landmarks/Models/UserData.swift
index efe0bee..afc2cca 100755
--- a/Other Projects/Drawing Paths And Shapes/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Drawing Paths And Shapes/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,17 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var showFavoritesOnly = false
 
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }
diff --git a/Other Projects/Handling User Input/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Handling User Input/Complete/Landmarks/Landmarks/Models/UserData.swift
index efe0bee..afc2cca 100755
--- a/Other Projects/Handling User Input/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Handling User Input/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,17 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var showFavoritesOnly = false
 
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }
diff --git a/Other Projects/Interfacing With UIKit/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Interfacing With UIKit/Complete/Landmarks/Landmarks/Models/UserData.swift
index efe0bee..afc2cca 100755
--- a/Other Projects/Interfacing With UIKit/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Interfacing With UIKit/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,17 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var showFavoritesOnly = false
 
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }
diff --git a/Other Projects/WWDCPlayer/WWDCPlayer/Model/UserData.swift b/Other Projects/WWDCPlayer/WWDCPlayer/Model/UserData.swift
index 5a42bdb..93ecc82 100755
--- a/Other Projects/WWDCPlayer/WWDCPlayer/Model/UserData.swift	
+++ b/Other Projects/WWDCPlayer/WWDCPlayer/Model/UserData.swift	
@@ -9,23 +9,9 @@ import SwiftUI
 import Combine
 
 final class UserData: ObservableObject  {
-    let objectWillChange = PassthroughSubject<UserData, Never>()
+    @Published var showFavoriteOnly = false
     
-    var showFavoriteOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var videos = videoList
     
-    var videos = videoList {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
-    
-    var currentVideo = videoList[0] {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var currentVideo = videoList[0]
 }
diff --git a/Other Projects/Working With UIControls/Complete/Landmarks/Landmarks/Models/UserData.swift b/Other Projects/Working With UIControls/Complete/Landmarks/Landmarks/Models/UserData.swift
index 2a54838..afc2cca 100755
--- a/Other Projects/Working With UIControls/Complete/Landmarks/Landmarks/Models/UserData.swift	
+++ b/Other Projects/Working With UIControls/Complete/Landmarks/Landmarks/Models/UserData.swift	
@@ -9,18 +9,7 @@ import Combine
 import SwiftUI
 
 final class UserData: ObservableObject {
+    @Published var showFavoritesOnly = false
 
-    let objectWillChange = PassthroughSubject<UserData, Never>()
-    
-    var showFavoritesOnly = false {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
-
-    var landmarks = landmarkData {
-        didSet {
-            objectWillChange.send(self)
-        }
-    }
+    @Published var landmarks = landmarkData
 }