esqueleto
learn-you-a-haskell
esqueleto | learn-you-a-haskell | |
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5 | 77 | |
177 | 294 | |
0.0% | - | |
0.0 | 0.0 | |
over 7 years ago | over 1 year ago | |
Haskell | Makefile | |
BSD 3-clause "New" or "Revised" License | - |
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esqueleto
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Revisiting Haskell after 10 years
Writing Haskell programs that rely on third-party packages is still an issue when it’s a not actively maintained package. They get out of date with the base library (Haskell’s standard library), and you might see yourself in a situation where you need to downgrade to an older version. This is not exclusive to Haskell, but it happens more often than I’d like to assume. However, if you only rely on known well-maintained libraries/frameworks such as Aeson, Squeleto, Yesod, and Parsec, to name a few, it’s unlikely you will face troubles at all, you just need to be more mindful of what you add as a dependency. There’s stackage.org now, a repository that works with Stack, providing a set of packages that are proven to work well together and help us to have reproducible builds in a more manageable way—not the solution for all the cases but it’s good to have it as an option.
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How to use PostgreSQL with Haskell: persistent + esqueleto
However, we can use Esqueleto (”a bare bones, type-safe EDSL for SQL queries”) with Persistent's serialization to write type-safe SQL queries. It’s unlikely that you want to use Persistent by itself with SQL, so let’s use and review them together.
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What databases do you find the most productive to connect to Haskell?
Postgresql-simple is a great library, it makes a nice use of overloaded strings to do the job. Some other nice libraries to keep an eye on are opaleye (postgres specific, which is equally nice but could be a bit difficult to get why the types are so big) and a combination of persistent (not DB specific! can work on postgres, sqlite, but also noSQL DBs like mongo, it's still easy to learn but you lose some things, such as joins due to the power of being agnostic) + esqueleto for type safe joins (be sure to look up the experimental package, it's a more comfortable syntax that will soon become the default one).
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Notes on Luca Palmieri's Zero to Production in Rust
Using esqueleto in one of my haskell projects was a huge time sink and a major barrier to entry for colleagues.
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Go performance from version 1.2 to 1.18
In Haskell: https://hackage.haskell.org/package/esqueleto
Either it analyzes the given SQL to determine the in/out types of each SQL query, or it calls the database describe feature at compile-time.
learn-you-a-haskell
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Revisiting Haskell after 10 years
The LYAH is by far my favorite book for beginners, however, it lacks exercises for you to practice, but you can still move along typing and playing with the examples shown, and it’s free to read online. It’s outdated but most of the code may still be valid with little to no changes.
- [2023 Day 09] How today felt
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Should I Haskell or OCaml?
Learn You a Haskell For Great Good! is also a really good resource:
https://learnyouahaskell.com/
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How late is too late to change tech stacks?
If you've never done functional, Learn You Some Erlang For Great Good was a very fun read, and I'll always love Learn You a Haskell for Great Good for showing me everything imperative languages kinda gloss over magically, as well as why I should never take a job working in Haskell!
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So Hows the Hackathon Going?
you start that way, but don't do http://learnyouahaskell.com really?
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I want to learn fn programming
Learn You a Haskell for Great Good!
- help i just discovered haskell 38 hours ago and i think i love it
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Haskell book after Get Programming with Haskell?
I enjoyed http://learnyouahaskell.com/ which is available in print and digital. Fun and lighthearted while still teaching reasonable depth. YMMV.
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Why I decided to learn (and teach) Clojure
Elm is a statically typed language inspired by Haskell. The natural step would be to use Elm on the frontend and Haskell on the backend. And that's what I tried to do. I read with some difficulty the Learn You a Haskell for Great Good! book (available for free here) and learned a lot of cool stuff. But creating a complete backend using Haskell proved to be more than I could chew. So I decided to look for alternatives...
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I’m trying coding
Here y’go!
What are some alternatives?
opaleye
learn4haskell - 👩🏫 👨🏫 Learn Haskell basics in 4 pull requests
yxdb-utils - Utilities for parsing Alteryx Database format
plutus-pioneer-program - This repository hosts the lectures of the Plutus Pioneers Program. This program is a training course that the IOG Education Team provides to recruit and train software developers in Plutus, the native smart contract language for the Cardano ecosystem.
groundhog - This library maps datatypes to a relational model, in a way similar to what ORM libraries do in OOP. See the tutorial https://www.schoolofhaskell.com/user/lykahb/groundhog for introduction
learn-you-a-haskell-notebook - Jupyter adaptation of Learn You a Haskell for Great Good!
hocilib - A lightweight Haskell binding to the OCILIB C API
coq - Coq is a formal proof management system. It provides a formal language to write mathematical definitions, executable algorithms and theorems together with an environment for semi-interactive development of machine-checked proofs.
beam - A type-safe, non-TH Haskell SQL library and ORM
algebra-driven-design - Source material for Algebra-Driven Design
mysql-simple - A mid-level client library for the MySQL database, intended to be fast and easy to use.
integrant - Micro-framework for data-driven architecture