Newsletter
Issue 128 2018-10-11
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Welcome to another issue of Haskell Weekly! Haskell is a safe, purely functional programming language with a fast, concurrent runtime. This is a weekly summary of what’s going on in its community.
Featured
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An introduction to linear regression using Haskell
I decided to stray a little off the beaten track and implement the programming exercises from Andrew’s course in Haskell instead. Haskell feels well-suited for this problem.
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I’ve been exploring the idea of an Elm compiler that produces assembly for the Erlang Virtual Machine. This essay documents some interesting parts of the project.
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Fullstack Haskell: Reflex and Servant
If it were 2005 you may have been able to get away with just blaze. But we are in 2018+, and JavaScript is a problem. In this blog post we will explore how to deal with JavaScript trough reflex and GHCJS.
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RAII is better than the bracket pattern
The RAII (Resource Acquisition Is Initialization) approach in both C++ and Rust leads to a nicer solution than even our bracket pattern in Haskell, by (mostly) avoiding the possibility of a premature close.
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Announce: Haskell code explorer: Tool that helps understand Haskell codebases
Haskell code explorer is a web application for exploring and understanding Haskell codebases. It provides the following features: Types and documentation on hover, go to definition, find references, type of each expression & semantic highlighting.
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Comprehending monoids with class
For expressing queries over collections of data, monoid comprehension can be more flexible, simpler, more efficient, and safer than its monadic counterpart.
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Counting inversions with monoidal sparks
Time for me to reveal the example I had in mind that led to the generalization in my previous post. Thanks for all the interesting comments: it seems like there are some interesting connections to be explored.
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Detailed walkthrough for a beginner Haskell program
This post walks through the development of a small Haskell program for aligning equals symbols in a block of text. This walkthrough targets a beginning programmer by describing several steps and concepts in extra detail.
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Making a Haskell interface for the Rosie pattern language
The Rosie Pattern Language (RPL) is a DSL for parsing strings which is more convenient and easier to work with than regular expressions. RPL is a Lua library with a C Foreign Function Interface (FFI). I noticed that there wasn’t a way to call it from Haskell.
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Writing a simple web application
I’ve talked about adding metrics to the Haskell application. I decided to prepare a full example that can be looked at and reused in later posts and projects.
Jobs
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Fullstack Developers at CitizenNet in Los Angeles
CitizenNet is hiring PureScript engineers! Come work at the leading social advertising platform in entertainment, now a key part of Condè Nast’s Spire data team managing one of the world’s largest content networks. Contribute to open source, build polished interfaces in PureScript, and work with talented & friendly teammates in Los Angeles.
In brief
- 2018 Haskell survey results
Control.Dsl
: An alternative to monads- Deeper Stack knowledge
- Full deck
ghci-hexcalc
: GHCi as a hex calculator- Haskell Communities and Activities Report, November 2018 edition: Call for contributions
- Penrose: Create beautiful mathematical diagrams
- Requesting feedback on OpenADT package
- What is new in cross compiling Haskell: August & September edition
- Wrapping up Haskell Book
Package of the week
This week’s package of the week is Autoexporter, a tool for automatically writing modules that simply re-export other modules.
Call for participation
Looking to participate in the fifth annual Hacktoberfest? Check out some of these issues with the “Hacktoberfest” label from Haskell repositories on GitHub!