# šŸ“š Official Books **URL:** https://forums.kodeco.com/c/books/6.md?page=46 [Latest](https://forums.kodeco.com/latest.md) Ā· [Categories](https://forums.kodeco.com/categories.md) Ā· [Tags](https://forums.kodeco.com/tags.md) **Page:** 47 --- ## [Share recursionMerge function in chapter 7: Linked List Challenges](https://forums.kodeco.com/t/share-recursionmerge-function-in-chapter-7-linked-list-challenges/142888)
**Author:** [@richmond\_jam](https://forums.kodeco.com/u/richmond_jam)\ **Replies:** 2\ **Last updated:** [July 1, 2021, 1:43pm UTC](https://forums.kodeco.com/t/share-recursionmerge-function-in-chapter-7-linked-list-challenges/142888 "2021-07-01T13:43:10Z")
Hi everyone, Finally, I received this Book named Data Structures & Algorithms in Swift (Third Edition) and when I read the chapter 7 and I want to use recursive implementation to finish Challenge 4. Now I show my codā€¦ --- ## [Chapter 9 Show Alert](https://forums.kodeco.com/t/chapter-9-show-alert/141624)
**Author:** [@briviere](https://forums.kodeco.com/u/briviere)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 1:27am UTC](https://forums.kodeco.com/t/chapter-9-show-alert/141624 "2021-07-01T01:27:18Z")
In chapter 9 Alert section there is a compile error in setting the showlert = true within the do catch init statement.\` I noticed that the final project in chapter 9 also has the same compile error if I uncomment the shoā€¦ --- ## [Chapter 19 Mediator Pattern](https://forums.kodeco.com/t/chapter-19-mediator-pattern/121593)
**Author:** [@mcneils](https://forums.kodeco.com/u/mcneils)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 3:59am UTC](https://forums.kodeco.com/t/chapter-19-mediator-pattern/121593 "2021-07-01T03:59:28Z")
Iā€™m lost as to what the colleagueā€™s computed property does in the Mediator wrapper class. It says in your book that is ā€œuses a filter to find colleagues from colleagueWrappers that have already been released and then retā€¦ --- ## [Chapter 10 - Testing the view model](https://forums.kodeco.com/t/chapter-10-testing-the-view-model/133704)
**Author:** [@nservidio](https://forums.kodeco.com/u/nservidio)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 3:52am UTC](https://forums.kodeco.com/t/chapter-10-testing-the-view-model/133704 "2021-07-01T03:52:29Z")
In chapter 10 weā€™re introduced to the view model. The instructions suggest that we optimize the view model by writing a function such as: extension PetViewModel { public func configure(\_ view: PetView) { view.namā€¦ --- ## [Chapter 23, Coordinator: Presenting viewController](https://forums.kodeco.com/t/chapter-23-coordinator-presenting-viewcontroller/130747)
**Author:** [@ilkercam](https://forums.kodeco.com/u/ilkercam)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 3:50am UTC](https://forums.kodeco.com/t/chapter-23-coordinator-presenting-viewcontroller/130747 "2021-07-01T03:50:32Z")
Code below I copied from chapter 23. The functionā€™s name is present but it is actually pushing. Am I missing a spot with this whole coordinator concept, whichever source I check, authors just ignore present and focus onā€¦ --- ## [Make Website for Android and iOS](https://forums.kodeco.com/t/make-website-for-android-and-ios/143146)
**Author:** [@abdullahsmith](https://forums.kodeco.com/u/abdullahsmith)\ **Replies:** 2\ **Last updated:** [July 1, 2021, 3:46am UTC](https://forums.kodeco.com/t/make-website-for-android-and-ios/143146 "2021-07-01T03:46:22Z")
can anyone make a website like slot online ? --- ## [Where can I find the 2nd edition of this book?](https://forums.kodeco.com/t/where-can-i-find-the-2nd-edition-of-this-book/134853)
**Author:** [@enrique.aliaga](https://forums.kodeco.com/u/enrique.aliaga)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 2:02am UTC](https://forums.kodeco.com/t/where-can-i-find-the-2nd-edition-of-this-book/134853 "2021-07-01T02:02:26Z")
Hi there, Iā€™ve finished reading up to chapter 5 (MVVM) of the 3rd edition of this book. Itā€™s awesome and Iā€™ve learned a lot! The thing isā€¦ in the company I work for, weā€™ll be using MVVM with RxSwift rather than Combineā€¦ --- ## [Chapter 8 shortened closures](https://forums.kodeco.com/t/chapter-8-shortened-closures/138181)
**Author:** [@pawi552](https://forums.kodeco.com/u/pawi552)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 2:00am UTC](https://forums.kodeco.com/t/chapter-8-shortened-closures/138181 "2021-07-01T02:00:18Z")
var multiplyClosure = { (a, b) in a\*b } Is causing error ā€œAmbiguous use of operator ā€˜\*ā€™ā€ Same error for var multiplyClousure = { $0 \* $1 } --- ## [Returning a Function - Different Result](https://forums.kodeco.com/t/returning-a-function-different-result/143220)
**Author:** [@vim](https://forums.kodeco.com/u/vim)\ **Replies:** 2\ **Last updated:** [July 1, 2021, 1:25am UTC](https://forums.kodeco.com/t/returning-a-function-different-result/143220 "2021-07-01T01:25:50Z")
Hi, in the ā€œReturning a Functionā€ section of Dart Apprentice v1.1.0 PDF (page 123), the output of: print(triple(6)); print(triple(14.0)); are: 18 42.0 But mine are: 18 42 Iā€™ve checked the code I typed several timesā€¦ --- ## [Materials zip file for SwiftUI Apprentice on GitHub broken](https://forums.kodeco.com/t/materials-zip-file-for-swiftui-apprentice-on-github-broken/143284)
**Author:** [@mctoons](https://forums.kodeco.com/u/mctoons)\ **Replies:** 1\ **Last updated:** [July 1, 2021, 1:16am UTC](https://forums.kodeco.com/t/materials-zip-file-for-swiftui-apprentice-on-github-broken/143284 "2021-07-01T01:16:09Z")
I tried downloading the zip file for the materials for this book a couple times and both times I got errors that the decompress operation failed. Using GitHub Desktop works fine. --- ## [Errata for Data Structures and Algorithms in Kotlin 1st Edition](https://forums.kodeco.com/t/errata-for-data-structures-and-algorithms-in-kotlin-1st-edition/82124)
**Author:** [@mandafrederick](https://forums.kodeco.com/u/mandafrederick)\ **Replies:** 5\ **Last updated:** [June 30, 2021, 3:37pm UTC](https://forums.kodeco.com/t/errata-for-data-structures-and-algorithms-in-kotlin-1st-edition/82124 "2021-06-30T15:37:27Z")
Creating this topic to catch any typos and bugs in the 1st Edition of Data Structures and Algorithms in Kotlin. --- ## [Section 1 Chp 2.2](https://forums.kodeco.com/t/section-1-chp-2-2/143098)
**Author:** [@amberspades](https://forums.kodeco.com/u/amberspades)\ **Replies:** 1\ **Last updated:** [June 29, 2021, 3:01pm UTC](https://forums.kodeco.com/t/section-1-chp-2-2/143098 "2021-06-29T15:01:01Z")
There is an unused variable printCount in printSort() --- ## [Errata for Data Structures and Algorithms in Swift, 3rd Edition](https://forums.kodeco.com/t/errata-for-data-structures-and-algorithms-in-swift-3rd-edition/83656)
**Author:** [@chrisrazeware](https://forums.kodeco.com/u/chrisrazeware)\ **Replies:** 5\ **Last updated:** [June 29, 2021, 2:59pm UTC](https://forums.kodeco.com/t/errata-for-data-structures-and-algorithms-in-swift-3rd-edition/83656 "2021-06-29T14:59:04Z")
The official errata thread for Data Structures and Algorithms, 3rd edition! --- ## [Extremely bad epub UX](https://forums.kodeco.com/t/extremely-bad-epub-ux/138098)
**Author:** [@rarescrap](https://forums.kodeco.com/u/rarescrap)\ **Replies:** 20\ **Last updated:** [June 26, 2021, 2:56pm UTC](https://forums.kodeco.com/t/extremely-bad-epub-ux/138098 "2021-06-26T14:56:54Z")
Hello, and let me thank you for your ā€œFlutter Apprenticeā€ book. This is the most recent book on this technology to date, covering everything I need to get started quickly and successfully. The material presented in the ā€¦ --- ## [Chapter 23 - Database/API Versioning and Migration](https://forums.kodeco.com/t/chapter-23-database-api-versioning-and-migration/55037)
**Author:** [@warplydesigned](https://forums.kodeco.com/u/warplydesigned)\ **Replies:** 5\ **Last updated:** [June 26, 2021, 11:12am UTC](https://forums.kodeco.com/t/chapter-23-database-api-versioning-and-migration/55037 "2021-06-26T11:12:46Z")
Not sure if Iā€™m missing something however I went through this chapter and didnā€™t see anything on API Versioningā€¦ normally to me that means V1 API, V2 API etcā€¦ that can change end points logic etcā€¦ Can you explain what yā€¦ --- ## [Chapter 7 Challenge - dollar sign vs no dollar sign](https://forums.kodeco.com/t/chapter-7-challenge-dollar-sign-vs-no-dollar-sign/142959)
**Author:** [@komocode](https://forums.kodeco.com/u/komocode)\ **Replies:** 2\ **Last updated:** [June 26, 2021, 12:48am UTC](https://forums.kodeco.com/t/chapter-7-challenge-dollar-sign-vs-no-dollar-sign/142959 "2021-06-26T00:48:29Z")
Why is WelcomeView passed in the history variable without a dollar sign but ExerciseView needs the dollar sign? Is it because ExerciseView is modifying the data while WelcomeView isnā€™t? struct ContentView: View { @Staā€¦ --- ## [java.lang.IllegalStateException: The component was not created. Check that you have added the HiltAndroidRule](https://forums.kodeco.com/t/java-lang-illegalstateexception-the-component-was-not-created-check-that-you-have-added-the-hiltandroidrule/142909)
**Author:** [@docmabuse](https://forums.kodeco.com/u/docmabuse)\ **Replies:** 0\ **Last updated:** [June 25, 2021, 9:12am UTC](https://forums.kodeco.com/t/java-lang-illegalstateexception-the-component-was-not-created-check-that-you-have-added-the-hiltandroidrule/142909 "2021-06-25T09:12:54Z")
Hi, I am doing a test based on 18 Hilt & Architecture Components, trackt app. Iā€™ve got this error on testing content provider : java.lang.IllegalStateException: The component was not created. Check that you have addedā€¦ --- ## [Error building sample code](https://forums.kodeco.com/t/error-building-sample-code/142842)
**Author:** [@nick-m](https://forums.kodeco.com/u/nick-m)\ **Replies:** 0\ **Last updated:** [June 24, 2021, 9:46am UTC](https://forums.kodeco.com/t/error-building-sample-code/142842 "2021-06-24T09:46:25Z")
Already on the first downloaded sample code (ā€œusing filesā€) I got a build error from Android Studio 4.2.1: ā€œThis project uses AndroidX dependencies, but the ā€˜android.useAndroidXā€™ property is not enabled. Set this properā€¦ --- ## [Background Notification Issues](https://forums.kodeco.com/t/background-notification-issues/142625)
**Author:** [@leebarnes](https://forums.kodeco.com/u/leebarnes)\ **Replies:** 2\ **Last updated:** [June 22, 2021, 10:36am UTC](https://forums.kodeco.com/t/background-notification-issues/142625 "2021-06-22T10:36:01Z")
When using silent push notifications to create a core data entry such as detailed in chapter 8 , I can make this consistently fail in testing. Initially the task works correctly in all three states \[Foreground, backgrounā€¦ --- ## [Chapter 5 Flutter Apprentice - Scrollable Widget](https://forums.kodeco.com/t/chapter-5-flutter-apprentice-scrollable-widget/142580)
**Author:** [@sugey](https://forums.kodeco.com/u/sugey)\ **Replies:** 7\ **Last updated:** [June 21, 2021, 5:47pm UTC](https://forums.kodeco.com/t/chapter-5-flutter-apprentice-scrollable-widget/142580 "2021-06-21T17:47:06Z")
Hello, I do not understand why I get error, If this is as it is in the book. I stay at this point ā†’ Adding the Nested ListView Iā€™m using the version of Flutter 2.7.0 that is from the book. what is the problem if I doā€¦ --- ## [Chapter 3: HeaderView Preview needs dark \`background\`](https://forums.kodeco.com/t/chapter-3-headerview-preview-needs-dark-background/142447)
**Author:** [@fdorado985](https://forums.kodeco.com/u/fdorado985)\ **Replies:** 3\ **Last updated:** [June 20, 2021, 3:19am UTC](https://forums.kodeco.com/t/chapter-3-headerview-preview-needs-dark-background/142447 "2021-06-20T03:19:58Z")
Hi team!, First of all amazing work with the book really didactic, I just have an small concern, such I mentioned on the title Iā€™m on Chapter 3: Working with Previews, just on this partā€¦ Set Color Scheme to Dark and Dā€¦ --- ## [Insights from WWDC](https://forums.kodeco.com/t/insights-from-wwdc/142554)
**Author:** [@lducot2](https://forums.kodeco.com/u/lducot2)\ **Replies:** 1\ **Last updated:** [June 20, 2021, 2:43am UTC](https://forums.kodeco.com/t/insights-from-wwdc/142554 "2021-06-20T02:43:31Z")
Hello everyone - I had an opportunity to speak with a couple of Apple engineers at WWDC about some questions I have been grappling with in Metal. In case anyone might benefit from their insights, Iā€™ve summarized some ofā€¦ --- ## [Any update will make for this book? Two years not update](https://forums.kodeco.com/t/any-update-will-make-for-this-book-two-years-not-update/142523)
**Author:** [@yangwulong1978](https://forums.kodeco.com/u/yangwulong1978)\ **Replies:** 0\ **Last updated:** [June 19, 2021, 9:59am UTC](https://forums.kodeco.com/t/any-update-will-make-for-this-book-two-years-not-update/142523 "2021-06-19T09:59:20Z")
Any update will make for this book? --- ## [Chapter 1 - page 33: "other" padding checkbox?](https://forums.kodeco.com/t/chapter-1-page-33-other-padding-checkbox/142281)
**Author:** [@wikea1](https://forums.kodeco.com/u/wikea1)\ **Replies:** 1\ **Last updated:** [June 19, 2021, 2:28am UTC](https://forums.kodeco.com/t/chapter-1-page-33-other-padding-checkbox/142281 "2021-06-19T02:28:00Z")
When adding padding modifier around a view in the viewā€™s attributes inspector, thereā€™s a reference to an ā€œotherā€ checkbox. The sentence is ā€œThen, when you click the other checkbox, the padding value changes to .horizontaā€¦ --- ## [Missing - Automatic Keyboard Avoidance](https://forums.kodeco.com/t/missing-automatic-keyboard-avoidance/142500)
**Author:** [@wikea1](https://forums.kodeco.com/u/wikea1)\ **Replies:** 0\ **Last updated:** [June 18, 2021, 7:14pm UTC](https://forums.kodeco.com/t/missing-automatic-keyboard-avoidance/142500 "2021-06-18T19:14:42Z")
In Chapter 6 for Kuchi, there is a section on ā€œShowing the keyboardā€ that integrates the provided boilerplate KeyboardFollower code which handles the shifting of the view up or down when the keyboard is displayed. I notiā€¦ --- ## [Can't append Float to pgsql array in Fluent](https://forums.kodeco.com/t/cant-append-float-to-pgsql-array-in-fluent/142212)
**Author:** [@urbanistica](https://forums.kodeco.com/u/urbanistica)\ **Replies:** 1\ **Last updated:** [June 18, 2021, 2:27pm UTC](https://forums.kodeco.com/t/cant-append-float-to-pgsql-array-in-fluent/142212 "2021-06-18T14:27:57Z")
I have a field defined as @Field(key: ā€œante\_rangeā€) var anteRange : \[Float\]? in my pgsql schema it appears as ante\_range | double precision\[\] | | | So there appear to be no problems. I senā€¦ --- ## [Vapor and Charles Proxy/Proxyman](https://forums.kodeco.com/t/vapor-and-charles-proxy-proxyman/142092)
**Author:** [@irillll](https://forums.kodeco.com/u/irillll)\ **Replies:** 1\ **Last updated:** [June 18, 2021, 2:08pm UTC](https://forums.kodeco.com/t/vapor-and-charles-proxy-proxyman/142092 "2021-06-18T14:08:40Z")
Hi there, I have a question related Vapor. usually I use either Charles or Proxyman to modify response from API during iOS development. but when I develop web app with vapor, I cannot see any API that gets called fromā€¦ --- ## [Any Update Planned for this ML Book](https://forums.kodeco.com/t/any-update-planned-for-this-ml-book/141925)
**Author:** [@absarf](https://forums.kodeco.com/u/absarf)\ **Replies:** 1\ **Last updated:** [June 18, 2021, 10:50am UTC](https://forums.kodeco.com/t/any-update-planned-for-this-ml-book/141925 "2021-06-18T10:50:59Z")
Based on WWDC-20 & 21 announcements on CreateML, I think this book should be updated with the new material. Thanks --- ## [WWDC20 - Book Update?](https://forums.kodeco.com/t/wwdc20-book-update/113004)
**Author:** [@fdorado985](https://forums.kodeco.com/u/fdorado985)\ **Replies:** 8\ **Last updated:** [June 17, 2021, 1:58am UTC](https://forums.kodeco.com/t/wwdc20-book-update/113004 "2021-06-17T01:58:11Z")
Hi, with this amazing new changes on SwiftUI, does this book will have an update? --- ## [Metal by Tutorials Next Ed](https://forums.kodeco.com/t/metal-by-tutorials-next-ed/123668)
**Author:** [@lducot2](https://forums.kodeco.com/u/lducot2)\ **Replies:** 5\ **Last updated:** [June 16, 2021, 10:25pm UTC](https://forums.kodeco.com/t/metal-by-tutorials-next-ed/123668 "2021-06-16T22:25:04Z")
Hey Caroline, Posting here but I think this may be a more general topic so please advise if I should post elsewhere. Iā€™m extremely excited about the updates to metal. Any idea on when the updates maybe coming out? ā€¦ [Previous page](https://forums.kodeco.com/c/books/6.md?page=45) [Next page](https://forums.kodeco.com/c/books/6.md?page=47)