Effective Haskell: Error in addPeano function (p 92, pdf)
The addPeano function switches the arguments in the recursive call. The implementation should be:
addPeano Z b = b
addPeano (S a) b = addPeano a (S b)
Popular Pragprog topics
When I try the command to create a pair of migration files I get an error.
user=> (create-migration "guestbook")
Execution ...
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
Dear Sophie.
I tried to do the “Authorization” exercise and have two questions:
When trying to plug in an email-service, I found the ...
New
Hello! Thanks for the great book.
I was attempting the Trie (chap 17) exercises and for number 4 the solution provided for the autocorre...
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’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
Hi,
I am getting an error I cannot figure out on my test.
I have what I think is the exact code from the book, other than I changed “us...
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
@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
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
Other popular topics
What chair do you have while working… and why?
Is there a ‘best’ type of chair or working position for developers?
New
New
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor?
Also, I want to know if someone is using it for program...
New
New
New
Oh just spent so much time on this to discover now that RancherOS is in end of life but Rancher is refusing to mark the Github repo as su...
New
Crystal recently reached version 1. I had been following it for awhile but never got to really learn it. Most languages I picked up out o...
New
Author Spotlight: James Stanier (@jstanier)
James Stanier, author of Effective Remote Work , discusses how to rethink the office as we...
New
Author Spotlight: Jamis Buck (@jamis)
This month, we have the pleasure of spotlighting author Jamis Buck, who has written Mazes for P...
New
Chris Seaton, the creator of TruffleRuby has died. It appears from suicide :cry:
He left this note on Twitter on the weekend:
And one...
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
- /vuejs
- /nim
- /emacs
- /nerves
- /elm
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!"