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happy to get the email this morning about the 1.1 version of the book! Just last night I spent an unnecessary amount of time figuring out...
New
There looks to be a misprint on page 217 of Book version: P1.0—March, 2026. A code block is displayed of a <.form> component with a...
New
On Page 104 you describe several ways to define lazy streams in general or the stream of the fibonacci numbers in general.
I propose to ...
New
Chapter 7 Iteration B2: Unit Test of Models has a structure problem: before “One Final Change”, the book says we “rerun the tests, and th...
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Title: Programming Phoenix LiveViw: v1.0 (page 84)
Example: Version mismatches in Chapter 3
There numerous mismatches between instructi...
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This Week's Trending
There looks to be a misprint on page 217 of Book version: P1.0—March, 2026. A code block is displayed of a <.form> component with a...
New
happy to get the email this morning about the 1.1 version of the book! Just last night I spent an unnecessary amount of time figuring out...
New
This Month's Trending
I just signed up for the forum to discuss the 1.0 version.
I don’t want to be a downer only a third of the way through the book, but I t...
New
Chapter 9/10 ebook-1.02 Genealogy not working well.
As already mentioned in one of the errata the ID of every chromosome is the same.
S...
New
Hi @andatki,
This is a follow-up to my previous error report, High Performance PostgreSQL for Rails: Confusing `SUBSTR` arguments in `SC...
New
Text is:
xor96/0 will generate integers. You can use it to generate integers between 0
and some number, like this:
iex(0)> rem(xor9...
New
The function tournament_no_duplicates keeps hanging, because it will never reach n winners.
In a selection of n chromosomes you can neve...
New
On page 80 (at the bottom) you execute the command
(first (System/getProperties))
and on top of page 81 you show the output as
` → ...
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The code starts with this:
publisher = Publisher.last
But the code after uses the variable p
if p in {authors: []}
puts "#{p.name} h...
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Elitist gives error at Enum.sort_by…
This is because “parents” is still a list of tuples.
It hast to be flattened: parents = Enum.flat_...
New
On Page 104 you describe several ways to define lazy streams in general or the stream of the fibonacci numbers in general.
I propose to ...
New
I am reading this book as part of a book club. Just finished chapter 4, and I think the ending section on complexity and why we are doing...
New
There are quite a lot of errors in the text.
My version of elixir (1.17.3) told me it is not allowed to place the first three functions ...
New
On page 69 you write:
Clojure provides a number of functions that create sequences. range produces
a sequence from a start to an end, ...
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Going through the book in 2026 is a bit challenging as all the tech moves on as time passes.
I started by trying to just select the mini...
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After running a while the benchee test I got the following error: no function clause matching in Task.async/1
I wrote a script with asyn...
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On page 74 you write
Note that the value returned is the value in the sequence, which would act
as a truthy value if this was used as ...
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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 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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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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Page 9 has the reader set up hello_bevy/Cargo.toml to inherit the workspace bevy dependency with:
bevy = { workspace = true }
However, ...
New
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
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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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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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...
New
There is a spelling mistake on page 90:
but is is possible
p.s. this is the first time I’m reporting a problem, if I made any mistakes ...
New
Title: Ash Framework B5: subheading typo (page 96)
In the book:
Adding informative descriptiont ← this
Some of the defaults in the g...
New
In “gallery/v14/src/main/kotlin/com/example/gallery/GetImageFromFile.kt”
won’t the .use always call channel.close() on exit? if so, why...
New
In the foolowing paragraph, it could be interesting to write what the EDN acronym means.
Additionally, there are variants in clojure.ed...
New
Page 151 explains how turbo stream works. The explanation says that the partial parameter refers to the file app/views/application/_cart....
New
The CI/CD GitHub action jobs:ci:compile uses erlef/setup-beam@v1.17.3 which ubuntu-latest as of 05/25/25 does not support.
gh run view ...
New
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...
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@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
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...
New
Is there any plan for volume 2? :slight_smile:
New
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...
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@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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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
@rubys
Following through the book but using Rails 7.1.2.
When trying to run the test on page 118 I get -
`
Error:
ProductsControllerT...
New
@TrevorBurnham
Maybe I missed it, but I think you need to add @testing-library/jest-dom to the compileOptions/types in tsconfig.json, ot...
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
I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint.
How to replicate:
load chapter-7 from zipfile i...
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
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...
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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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