Functional Programming in Java, Second Edition: mapToInt() referenced instead of mapToDouble() (page 21)
On page 21:
For each price from the prices list that passes through the filter(), the mapToInt() method invokes the provided lambda expression to transform the given price to a discounted price.
Reference to mapToInt() is incorrect, as on the previous page (Page 20) to example code contains mapToDouble() which makes the code working.
Popular Pragprog topics
page 37
ANTLRInputStream input = new ANTLRInputStream(is);
as of ANTLR 4 .8 should be:
CharStream stream = CharStreams.fromStream(i...
New
Many tasks_proj/tests directories exist in chapters 2, 3, 5 that have tests that use the custom markers smoke and get, which are not decl...
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
#book-python-testing-with-pytest-second-edition
Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
New
Title: Build a Weather Station with Elixir and Nerves: Problem connecting to Postgres with Grafana on (page 64)
If you follow the defau...
New
Is there any place where we can discuss the solutions to some of the exercises? I can figure most of them out, but am having trouble with...
New
The allprojects block listed on page 245 produces the following error when syncing gradle:
“org.gradle.api.GradleScriptException: A prob...
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 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...
New
Other popular topics
Reading something? Working on something? Planning something? Changing jobs even!?
If you’re up for sharing, please let us know what you’...
New
A PragProg Hero’s Journey with Brian P. Hogan @bphogan
Have you ever worried that your only legacy will be in the form of legacy...
New
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face:
...
New
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting:
asdf install erlang 23.1.2
Configure failed.
checking ...
New
Do the test and post your score :nerd_face:
:keyboard:
If possible, please add info such as the keyboard you’re using, the layout (Qw...
New
API 4
Path:
/user/following/
Method:
GET
Description:
Returns the list of all names of people whom the user follows
Response
[
{ ...
New
Author Spotlight: James Stanier (@jstanier)
James Stanier, author of Effective Remote Work , discusses how to rethink the office as we...
New
Rails 7 completely redefines what it means to produce fantastic user experiences and provides a way to achieve all the benefits of single...
New
This is cool!
DEEPSEEK-V3 ON M4 MAC: BLAZING FAST INFERENCE ON APPLE SILICON
We just witnessed something incredible: the largest open-s...
New
Latest in Pragprog
Latest (all)
Categories:
My Saved Portals
-
None saved yet
Popular Portals
- /elixir
- /opensuse
- /rust
- /kotlin
- /ruby
- /erlang
- /python
- /clojure
- /react
- /quarkus
- /go
- /vapor
- /v
- /react-native
- /wasm
- /security
- /django
- /nodejs
- /centos
- /haskell
- /rails
- /fable
- /gleam
- /swift
- /js
- /deno
- /assemblyscript
- /tailwind
- /laravel
- /symfony
- /phoenix
- /crystal
- /typescript
- /debian
- /adonisjs
- /julia
- /arch-linux
- /svelte
- /spring
- /preact
- /flutter
- /c-plus-plus
- /actix
- /java
- /angular
- /ocaml
- /zig
- /kubuntu
- /scala
- /zotonic
- /vim
- /rocky
- /lisp
- /html
- /keyboards
- /nim
- /vuejs
- /emacs
- /elm
- /nerves
Devtalk Sponsors
Practical resources that improve the lives of professional developers.
We build trusted fault-tolerant systems that scale to billions of users.
Catch errors, track performance, monitor hosts and more.
Enabling companies to succeed by building software people love.
Courses that'll move you from confusion to "Aha, now I get it!"