From Wikipedia, the free encyclopedia

Haskell may refer to:

• Haskell (programming language), a standardized pure functional programming language with non-strict semantics
• Haskell Indian Nations University, a four year degree granting university in Lawrence, Kansas which offers free tuition to members of registered Native American tribes in the United States
• Haskell Free Library and Opera House, a neoclassical building located in Rock Island, Quebec and Derby Line, Vermont
• Haskell Invitational Handicap, a Grade I race for thoroughbred horses
• Haskell-Baker Wetlands, approximately 640 acres (2.6 km²) on the south side of Lawrence, Kansas
• Haskell Oriental Museum, a forerunner of the Oriental Institute of the University of Chicago

Haskell is one of several locations in the United States:

• Haskell, Arkansas
• Haskell, New Jersey
• Haskell, Oklahoma
• Haskell, Texas
• Haskell County, Kansas
• Haskell County, Oklahoma
• Haskell County, Texas

Haskell is a surname:

• Arnold Haskell, 1903–1980, a British dance critic
• Charles N. Haskell, an American lawyer, oilman, and statesman
• Colleen Haskell, former reality show contestant and actress
• Eddie Haskell
• Edward Haskell
• Ella J. Knowles Haskell
• Floyd K. Haskell
• Francis Haskell
• Gordon Haskell
• James Haskell
• Martin Haskell
• Molly Haskell
• Nathaniel M. Haskell, a former Maine Republican politician
• Susan Haskell, actress from One Life to Live and JAG

Haskell is a given name:

• Haskell Curry, the logician after whom the Haskell programming language is named
• Haskell Wexler, cinematographer

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

From Wikitravel

Haskell is in the Green Country region of Oklahoma.

From Wikiversity

The Haskell Computer Programming Course

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The Lambda Glyph, often used as the Haskell logo.

Introduction

Hello, and welcome to the future home of the Haskell Computer Programming Course. We will be learning about the Haskell programming language.

Contributing

All contributions are appreciated. Even newcomers are welcome to make changes, remember Be bold !

Lessons for Beginners

Lesson one- Introduction to Haskell

• • What is Haskell?
  • How is Haskell different than other languages?
    • Haskell compared with:
      • C
      • C++
      • Java
      • Python
      • Basic
        • Visual Basic
      • Lisp
        • Common Lisp
        • Scheme

• • What is functional programming?

Lesson two-

Intermediate Lessons

Lesson one-

Lesson two-

Advanced Lessons

Lesson one-

Lesson two-

Class Project?

• Spell check bot?

Further Reading

The Haskell Wikibook

The Haskell Wikipedia Article

Definition from Wiktionary, a free dictionary

English

Proper noun

Haskell

1. An English patronymic surname derived from the Old Norse given name Áskell.
2. A Jewish surname derived from the equivalent of English Ezekiel.
3. A male given name transferred from the surnames.
4. (computing, programming languages) A type of functional programming language with features such as support for recursive functions and pattern-matching. (Named after the logician Haskell Curry)

Translations

See also

• Wikipedia article on Haskell

From Wikibooks, the open-content textbooks collection



Haskell is a featured book on Wikibooks because it contains substantial content, it is well-formatted, and the Wikibooks community has decided to feature it on the main page or in other places. Please continue to improve it and thanks for the great work so far! You can edit its advertisement template.

Haskell :: Functional Programming with Types

Haskell is a functional programming language. If you have programmed before and would like to see a little bit of how Haskell works and is different from other programming languages, you can get an overview.

Haskell is unique for two reasons. The first is that it is purely functional. If you have a function and you call it twice in two different places with the same arguments then it will return exactly the same value both times. Secondly, Haskell provides a very modern type system which incorporates features like typeclasses and generalized algebraic data types. (We don't expect you to know what these terms mean for now, but we do hope they'll be rolling smoothly off your tongue by the time you are done with this book.)

So, why do Haskellers like the language then? Is it just because we like using things that are unique and modern? No, Haskell programmers enjoy their work because dealing with just pure functions makes it so much easier to understand our programs and prove them correct. Moreover, having an advanced type system helps us catch our mistakes, both the silly and profound ones.

In this book we aim to introduce you both to the Haskell language, from the very basics to its most advanced features, and to computer programming in general. Seasoned programmers, we urge you to be especially patient with this process. In all likelihood, the languages you are most familiar with differ greatly from Haskell, and habits from those languages might make it more difficult to understand how things work: simple, but different. So treat this as an adventure, a whole different world, seeing programming through the warped and mathematical mindset of a functional programmer.

A printable version of Haskell is available. (edit it)

A PDF version is available. (info)

Overview

The book is divided into three sections, namely, the Beginner's Track, the Advanced Track, and Practical Haskell. The last is designed to cover the more day-to-day issues, and to be readable with simply the knowledge of the Beginner's Track.

Please contribute! Everyone, regardless of Haskell competency, can help out. Spend five minutes improving a module and save someone else hours of time. Check out the notes for contributors.

Beginner's Track

This section will introduce you to the very basics of the language and some of the more frequently used libraries. This will enable you to build simple programs and prepare you for the advanced track.

Advanced Track

This section will introduce wider functional programming concepts such as different data structures and type theory. It will also cover more practical topics like concurrency.

Haskell in Practice

This section covers the more day-to-day issues of working with Haskell, issues such as making use of the standard library, building graphical interfaces or working with databases. You should be able to jump directly to this section from the basic track.

Appendices

Answers to exercises

Syntactic sugar

Authors and Acknowledgements

Notes for contributors

To do

Templates for the Haskell wikibook

Alternate tutorials

• Write Yourself a Scheme in 48 Hours - (imported) An alternate approach to teaching Haskell (and perhaps Scheme), aimed at a more advanced audience (though not necessarily one that knows how to program!)
• Yet Another Haskell Tutorial - (imported) is aimed at beginners and takes a practical approach to things. It is now part of this wikibook and will eventually be mixed in to the main text.
• Haskell Meta-tutorial - the tutorial to find other tutorials

Additional resources

• haskell.org - Resources for learning Haskell.
• The resource page for Haskell: the craft of functional programming