Write Yourself a Scheme in 48 Hours
by Jonathan Tang
Publisher: Wikibooks 2007
Number of pages: 138
You'll start off with command-line arguments and parsing, and progress to writing a fully-functional Scheme interpreter that implements a good-sized subset of R5RS Scheme. Along the way, you'll learn Haskell's I/O, mutable state, dynamic typing, error handling, and parsing features. By the time you finish, you should be fairly fluent in both Haskell and Scheme.
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by Simon Marlow
This tutorial will introduce the main programming models available for concurrent and parallel programming in Haskell. The text should serve as an introduction to the fundamental concepts through the use of practical examples.
by Conrad Barski - Lisperati.com
This tutorial will walk you through how to organize a mass picnic in a public park map in less than 100 lines of Haskell. You can just cut and paste the code bit by bit, and your new program will magically create more and more cool graphics.
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Haskell is a lot more mathematically rigorous than other programming languages. This is a book that will show you around Haskell. If you're not already familiar with programming in another language, you might need to put in extra work.
by Michael Snoyman - O'Reilly Media
This fast-moving guide introduces web application development with Haskell and Yesod, a combination that supports high-performing applications. You will explore the way Yesod handles widgets, forms, persistence, and RESTful content.