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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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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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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
On page 41 you write
cond has no default fallthrough expression,
I first thought, that the conditions must be exhaustive (as e.g. in ...
New
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=>...
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This Week's Trending
On page 41 you write
cond has no default fallthrough expression,
I first thought, that the conditions must be exhaustive (as e.g. in ...
New
(.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...
New
Title: Programming Elixir >= 1.6: Impossible exercise (page 45)
We agreed with AI that it is impossible to resolve Exercise: Function...
New
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
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=>...
New
Puzzle 10 page 40:
“[…] Chi, encoded in UTF-8 as 0xCE 0xA7.”
should be
“[…] Chi, encoded in UTF-8 as 0x03 0xA7.”
Example: println!(“\...
New
This Month's Trending 
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”
New
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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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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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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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...
New
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...
New
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...
New
On pages 5 and 6 there are 3 occasions of “_world” which should be “hello_world” instead.
New
On page 26 you explain the use of anonymous functions with the example
(require '[clojure.string :as str])
(filter indexable-word? (str/...
New
In Install Elixir, Postgres, Phoenix, and LiveView it says:
Make sure you get at least the minimal version of Elixir (>= 1.14 as of ...
New
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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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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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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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.
New
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(...
New
This Year's Trending 
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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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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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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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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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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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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Context
Hardware & OS:
OS: macOS Tahoe 26.0 arm64
Host: MacBook Pro
Observation
One of the code snippets as seen in epub is this...
New
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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Page 9 has the reader set up hello_bevy/Cargo.toml to inherit the workspace bevy dependency with:
bevy = { workspace = true }
However, ...
New
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...
New
Has anyone else run into this error message? Class not decoded 'valsrevenge.HealthComponent'
I have seen this when trying to run the exa...
New
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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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...
New
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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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 Years
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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@mfazio23
Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...
New
@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,...
New
Getting an error when installing the dependencies at the start of this chapter:
could not compile dependency :exla, "mix compile" failed...
New
root_layout: {PentoWeb.LayoutView, :root},
This results in the following following error:
no “root” html template defined for PentoWeb...
New
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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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 ...
New
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...
New
Docker-Machine became part of the Docker Toolbox, which was deprecated in 2020, long after Docker Desktop supported Docker Engine nativel...
New
Is there any plan for volume 2? :slight_smile:
New
@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...
New
Disclaimer: I hope all of this is accurate, and not the result of some stupid typo I failed to notice. Anyways…
This post comprises 2 is...
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@rubys
Title: Name of book: text: Agile Web Development Rails6, p. 183, Iteration G1: Capturing an Order.
I started working on a web de...
New
the statement “The quantum state of a qubit is obtained by reading across a row … |0011>” seems quite problematic to me.
First, the q...
New
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...
New
Trending Over 3 Years
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...
New
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 ...
New
I ran this command after installing the sample application:
$ cards add do something --owner Brian
And got a file not found error:
Fil...
New
When I run the coverage example to report on missing lines, I get:
pytest --cov=cards --report=term-missing ch7
ERROR: usage: pytest [op...
New
I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint.
How to replicate:
load chapter-7 from zipfile i...
New
your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...
New
@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...
New
Running the examples in chapter 5 c under pytest 5.4.1 causes an AttributeError: ‘module’ object has no attribute ‘config’.
In particula...
New
I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint.
As entered, the SwitchCompat changes color to hol...
New
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_...
New
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 ...
New
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...
New
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...
New
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...
New
The allprojects block listed on page 245 produces the following error when syncing gradle:
“org.gradle.api.GradleScriptException: A prob...
New
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