
yonvata
From objects to functions - typos in exercises 4.x
There are a couple of typos and unclarities in exercise 4.x:
4.3:
the text shows that the expected output of the following code should be *abc
:
val starPrefixFn = ::strConcat.curry()("*")
println(starPrefixFn("abc"))
However, the strConcat
is defined with a space so the expected output should be * abc
in 4.4 the class EmailTemplate
inherits from a function so we can use the invoke()
function, but it should be written with the override
keyword as follow:
class EmailTemplate(fileName: String): (Person) -> String {
override fun invoke(aPerson: Person): String = TODO()
}
First Post!

uberto
Thanks, I’m actually noted those when writing the exercise solutions. I’ll publish them soon.
Popular Pragmatic Bookshelf topics

Running the examples in chapter 5 c under pytest 5.4.1 causes an AttributeError: ‘module’ object has no attribute ‘config’.
In particula...
New

Hi Brian,
Looks like the api for tinydb has changed a little. Noticed while working on chapter 7 that the .purge() call to the db throws...
New

Hello! On page xix of the preface, it says there is a community forum "… for help if your’re stuck on one of the exercises in this book… ...
New

Hi @Margaret ,
On page VII the book tells us the example and snippets will be all using Elixir version 1.11
But on page 3 almost the en...
New

Hi,
build fails on:
bracket-lib = “~0.8.1”
when running on Mac Mini M1 Rust version 1.5.0:
Compiling winit v0.22.2
error[E0308]: mi...
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

I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m im...
New

Modern Front-End Development for Rails - application does not start after run bin/setup (page xviii)
After some hassle, I was able to finally run bin/setup, now I have started the rails server but I get this error message right when I vis...
New

Title: Agile Web Development with Rails 7: (page 70)
I am running windows 11 pro with rails 7.0.3 and ruby 3.1.2p20 (2022-04-12 revision...
New

I am using Android Studio Chipmunk | 2021.2.1 Patch 2
Build #AI-212.5712.43.2112.8815526, built on July 10, 2022
Runtime version: 11.0....
New
Other popular topics

Hello Devtalk World!
Please let us know a little about who you are and where you’re from :nerd_face:
New

What chair do you have while working… and why?
Is there a ‘best’ type of chair or working position for developers?
New

Curious to know which languages and frameworks you’re all thinking about learning next :upside_down_face:
Perhaps if there’s enough peop...
New

I’ve been hearing quite a lot of comments relating to the sound of a keyboard, with one of the most desirable of these called ‘thock’, he...
New
New

This is going to be a long an frequently posted thread.
While talking to a friend of mine who has taken data structure and algorithm cou...
New

Author Spotlight
Rebecca Skinner
@RebeccaSkinner
Welcome to our latest author spotlight, where we sit down with Rebecca Skinner, auth...
New

zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig.
General-purpose programming language and toolchain for maintaini...
New

This is a very quick guide, you just need to:
Download LM Studio: https://lmstudio.ai/
Click on search
Type DeepSeek, then select the o...
New

Background
Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
New
Categories:
Sub Categories:
Popular Portals
- /elixir
- /rust
- /ruby
- /wasm
- /erlang
- /phoenix
- /keyboards
- /rails
- /js
- /python
- /security
- /go
- /swift
- /vim
- /clojure
- /emacs
- /haskell
- /java
- /onivim
- /svelte
- /typescript
- /crystal
- /kotlin
- /c-plus-plus
- /tailwind
- /gleam
- /ocaml
- /react
- /elm
- /flutter
- /vscode
- /ash
- /opensuse
- /centos
- /php
- /deepseek
- /html
- /zig
- /scala
- /textmate
- /sublime-text
- /lisp
- /nixos
- /debian
- /react-native
- /agda
- /kubuntu
- /arch-linux
- /ubuntu
- /django
- /revery
- /manjaro
- /spring
- /nodejs
- /diversity
- /lua
- /julia
- /c
- /slackware
- /neovim