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david-wallace-croft
Puzzle 10 page 40: “[…] Chi, encoded in UTF-8 as 0xCE 0xA7.” should be “[…] Chi, encoded in UTF-8 as 0x03 0xA7.” Example: println!(“\...
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aac1122
Title: Programming Elixir >= 1.6: Impossible exercise (page 45) We agreed with AI that it is impossible to resolve Exercise: Function...
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grylix
On page 42 you write recur binds new values for loop’s bindings and returns control to the top of the loop. I recommend to add, that...
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grylix
On page 41 you write cond has no default fallthrough expression, I first thought, that the conditions must be exhaustive (as e.g. in ...
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grylix
You could on page 38 mention, that the qualified name of a static method can be used as a function to be used later. Example: user=&gt...
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This Week's TrendingTop

grylix
On page 41 you write cond has no default fallthrough expression, I first thought, that the conditions must be exhaustive (as e.g. in ...
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grylix
(.x p) ;; or (.-x p) for disambiguation with 0-arity methods I was thinking some time over this comment and did not understand it; in p...
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aac1122
Title: Programming Elixir >= 1.6: Impossible exercise (page 45) We agreed with AI that it is impossible to resolve Exercise: Function...
New
grylix
On page 42 you write recur binds new values for loop’s bindings and returns control to the top of the loop. I recommend to add, that...
New
grylix
You could on page 38 mention, that the qualified name of a static method can be used as a function to be used later. Example: user=&gt...
New
david-wallace-croft
Puzzle 10 page 40: “[…] Chi, encoded in UTF-8 as 0xCE 0xA7.” should be “[…] Chi, encoded in UTF-8 as 0x03 0xA7.” Example: println!(“\...
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This Month's Trending Top

erazor-de
On page 66 the text reads “The diagram at the top og the nect page” which should be “The diagram at the top of the next page”
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NekoiNemo
On the page 57 you show pcg_rand = "0.13" as a search result for the PCG algo, but later use rand_pcg on the page 58. Which are two diffe...
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erazor-de
The script in the green box should read #!/bin/bash cd (base path)/more_hands/my_library cargo test --no-default-features cargo test --n...
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NekoiNemo
Setup Asset Store On page 120 we’re told to make a fn setup in asset_manager, in a format of a bevy system, this is done after being told...
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NekoiNemo
Don’t repeat yourself (DRY). Solve a problem or implement an algorithm once, and you can reuse the result over and over again in a librar...
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erazor-de
I’m reading the P1.0 version of this book right now. I’m on page 86 now and I feel like I spend more time posting errata in this forum th...
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NekoiNemo
The function body as it’s presented is quite unwieldy. It was probably a good opportunity to point out to the audience that ? can also be...
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erazor-de
On pages 5 and 6 there are 3 occasions of “_world” which should be “hello_world” instead.
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grylix
On page 26 you explain the use of anonymous functions with the example (require '[clojure.string :as str]) (filter indexable-word? (str/...
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mikestok
In Install Elixir, Postgres, Phoenix, and LiveView it says: Make sure you get at least the minimal version of Elixir (>= 1.14 as of ...
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NekoiNemo
In this code, you generated a random u32 and then converted it to a usize to match the sprite index type. What you wanted was an f32 betw...
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lkuty
In the code sample at the top of the page, the error message No instance for (Data.String.IsString Int) is not correct and should be the ...
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erazor-de
Page 96 shows code for function setup_menus. The text in the middle of the page instead refers to function setup_main_menu which does now...
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grylix
There is an empty box at the beginning of page 24, I assume that it is the (empty) rest of the box which is shown on page 23.
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erazor-de
On top of page 89 it is shown how systems can be called on specific states and transitions. Example: .add_systems(OnEnter, setup.run_if(...
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This Year's Trending Top

nfstern
Title: Agile Web Development with Rails 8 (page 9) Suggestion: Add watchman to the list of packages to install In Chapter 6 page 71 whe...
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eajrezz
Thank you for writing such a helpful book! I’ve been enjoying learning about Hotwire Native and Rails. I have a question regarding hidin...
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Tretent
On page 93, reference is made to the file lorem.jpg, which should be located in the test/fixtures/files folder; however, the file is not ...
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ingilniero
The first time the navigatorHostId is set it uses the value R.id.main_nav_host supposedly added to to activity_main.xml in previous step...
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lkuty
On page 13, how to make (require 'examples.introduction) work ? How to augment the CLASSPATH such that clj is able to find examples/intro...
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dhmitchell
The text "“ What we do have is that suspension-point icon next to awaitResponse,” presumes we didn’t have those icons in the execute ver...
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s2k
Context Hardware & OS: OS: macOS Tahoe 26.0 arm64 Host: MacBook Pro Observation One of the code snippets as seen in epub is this...
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pgmcdonnell
Thanks for the excellent book @elliefairholm and @Gilacost , really well paced and clearly written. One small suggestion: I think it wou...
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dyozie
Page 9 has the reader set up hello_bevy/Cargo.toml to inherit the workspace bevy dependency with: bevy = { workspace = true } However, ...
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Javaru
I suspect this is something that will be caught in editing, but just in case not… The text box at the bottom of page 78 extends on to the...
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jav-solo
Has anyone else run into this error message? Class not decoded 'valsrevenge.HealthComponent' I have seen this when trying to run the exa...
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dglaser
Showing how to add the hotwire-native-app variant in .tailwind.config.js is great for readers using Tailwind 3. However, new Rails 8 appl...
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Javaru
Pg 41 states “Run the code, and you’ll see the placeholder message in a small window, just like last time.” for the code astronomy/v4/src...
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lmendelowski
Hello! I’m neither an Elixir nor Phoenix or Ash expert, but I believe I found misinformation in the A brief detour into LiveView process...
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jaeyson
Title: Ash Framework B5: subheading typo (page 96) In the book: Adding informative descriptiont ← this Some of the defaults in the g...
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Trending Last Three YearsTop

dachristenson
I just bought this book to learn about Android development, and I’m already running into a major issue in Ch. 1, p. 20: “Update activity...
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dachristenson
@mfazio23 Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...
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mcpierce
@mfazio23 I’ve applied the changes from Chapter 5 of the book and everything builds correctly and runs. But, when I try to start a game,...
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SlowburnAZ
Getting an error when installing the dependencies at the start of this chapter: could not compile dependency :exla, "mix compile" failed...
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gorkaio
root_layout: {PentoWeb.LayoutView, :root}, This results in the following following error: no “root” html template defined for PentoWeb...
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davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
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roadbike
From page 13: On Python 3.7, you can install the libraries with pip by running these commands inside a Python venv using Visual Studio ...
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dachristenson
I’ve got to the end of Ch. 11, and the app runs, with all tabs displaying what they should – at first. After switching around between St...
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redconfetti
Docker-Machine became part of the Docker Toolbox, which was deprecated in 2020, long after Docker Desktop supported Docker Engine nativel...
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dachristenson
@mfazio23 I had the project running as of p. 249, but by the end of Ch. 10 (p. 258), something new has made the program crash when it tr...
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Sirius
@rubys Title: Name of book: text: Agile Web Development Rails6, p. 183, Iteration G1: Capturing an Order. I started working on a web de...
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DoLed
the statement “The quantum state of a qubit is obtained by reading across a row … |0011>” seems quite problematic to me. First, the q...
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mcpierce
I’ve downloaded the sources for the book (dated 2021) after having bought it on Amazon. However, the downloaded sources don’t run in Andr...
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Trending Over 3 YearsTop

nicoatridge
Hi, I have just acquired Michael Fazio’s “Kotlin and Android Development” to learn about game programming for Android. I have a game in p...
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adamwoolhether
When trying to generate the protobuf .go file, I receive this error: Unknown flag: --go_opt libprotoc 3.12.3 MacOS 11.3.1 Googling ...
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leonW
I ran this command after installing the sample application: $ cards add do something --owner Brian And got a file not found error: Fil...
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brunogirin
When I run the coverage example to report on missing lines, I get: pytest --cov=cards --report=term-missing ch7 ERROR: usage: pytest [op...
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jskubick
I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint. How to replicate: load chapter-7 from zipfile i...
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yulkin
your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...
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a.zampa
@mfazio23 I’m following the indications of the book and arriver ad chapter 10, but the app cannot be compiled due to an error in the Bas...
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johnp
Running the examples in chapter 5 c under pytest 5.4.1 causes an AttributeError: ‘module’ object has no attribute ‘config’. In particula...
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jskubick
I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint. As entered, the SwitchCompat changes color to hol...
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ggerico
I got this error when executing the plot files on macOS Ventura 13.0.1 with Python 3.10.8 and matplotlib 3.6.1: programming_ML/code/03_...
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cro
I am working on the “Your Turn” for chapter one and building out the restart button talked about on page 27. It recommends looking into ...
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jon
Some minor things in the paper edition that says “3 2020” on the title page verso, not mentioned in the book’s errata online: p. 186 But...
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abtin
page 20: … protoc command… I had to additionally run the following go get commands in order to be able to compile protobuf code using go...
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jamis
The following is cross-posted from the original Ray Tracer Challenge forum, from a post by garfieldnate. I’m cross-posting it so that the...
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jonmac
The allprojects block listed on page 245 produces the following error when syncing gradle: “org.gradle.api.GradleScriptException: A prob...
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