Fudgets

Fudgets
Original author(s)	Thomas Hallgren,; Magnus Carlsson
Initial release	June 1993; 31 years ago
Stable release	0.18.4 / June 2023; 1 year ago
Written in	Haskell
Operating system	POSIX compatible: Unix, Unix-like, Linux, macOS via XQuartz
Platform	IA-32, x86-64
Available in	English
Type	GUI toolkit
License	freeware non-commercial

In computing, Fudgets is a graphical user interface toolkit for the functional programming language Haskell and the X Window System.^[1]^[2] Fudgets makes it easy to create client–server model applications that communicate via the Internet.

Most of the work on Fudgets was done in 1991-1996 by Thomas Hallgren and Magnus Carlsson.^[3]

The authors claim that many of the advantages of Fudgets come from it being programmed in a lazy functional programming language.^[4]

The main entity of toolkit is fudget (implemented on low level through stream processors) which has its own input and output.^[5] Fudgets can be composed in parallel or sequence, yielding new fudget which can be used in code as any other fudget.

Example

factorialF  = stdoutF >==< mapF (show . factorial . read) >==< stdinF
factorial   :: Integer -> Integer
factorial n = product [1..n]

The code is self-describing considering that >==< is sequential fudget plumbing and mapF is fudget that takes a function of one argument and makes a fudget which output is input applied to that function. Fudget composition must be read from right to left, as a simple function composition. Now you can simply write:

main = fudlogue factorialF

compile and run. For every given integer value it will print its factorial.

License

The software license of Fudgets claims that this software is freeware for non-commercial use only.

References

^ Hallgren, Thomas; Carlsson, Magnus (1995). "Programming with Fudgets". In Jeuring, Johan; Meijer, Erik (eds.). Advanced Functional Programming. Lecture Notes in Computer Science. Vol. 925. Berlin, Heidelberg: Springer. pp. 137–182. doi:10.1007/3-540-59451-5_5. ISBN 978-3-540-49270-2.
^ Reid, Alastair; Singh, Satnam (1994). "Implementing Fudgets with Standard Widget Sets". Written at Ayr, Scotland. In O’Donnell, John T.; Hammond, Kevin (eds.). Functional Programming, Glasgow 1993: Proceedings of the 1993 Glasgow Workshop on Functional Programming, 5–7 July 1993. Workshops in Computing. London: Springer. pp. 222–235. doi:10.1007/978-1-4471-3236-3_18. ISBN 978-1-4471-3236-3. Retrieved 2023-10-26.
^ Hallgren, Thomas; Carlsson, Magnus (June 6, 2023). "Fudgets Home Page". altocumulus.org. Retrieved October 25, 2023.
^ Carlsson, Magnus; Hallgren, Thomas (1993-07-01). "Fudgets: A graphical user interface in a lazy functional language". Proceedings of the conference on Functional programming languages and computer architecture. ACM. pp. 321–330. doi:10.1145/165180.165228. ISBN 978-0-89791-595-3. S2CID 9943994.
^ Burton, F. Warren (1999). "Advanced Functional Programming: Lecture Notes in Computer Science 925 edited by Johan Jeuring and Erik Meijer, Springer-Verlag, 1995". Journal of Functional Programming. 9 (1): 105–111. doi:10.1017/S0956796899223246. ISSN 1469-7653.

External links

Official website, latest release marked January 13, 2016
Fudgets Phd thesis by Hallgren and Carlsson

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[1] Hallgren, Thomas; Carlsson, Magnus (1995). "Programming with Fudgets". In Jeuring, Johan; Meijer, Erik (eds.). Advanced Functional Programming. Lecture Notes in Computer Science. Vol. 925. Berlin, Heidelberg: Springer. pp. 137–182. doi:10.1007/3-540-59451-5_5. ISBN 978-3-540-49270-2.

[2] Reid, Alastair; Singh, Satnam (1994). "Implementing Fudgets with Standard Widget Sets". Written at Ayr, Scotland. In O’Donnell, John T.; Hammond, Kevin (eds.). Functional Programming, Glasgow 1993: Proceedings of the 1993 Glasgow Workshop on Functional Programming, 5–7 July 1993. Workshops in Computing. London: Springer. pp. 222–235. doi:10.1007/978-1-4471-3236-3_18. ISBN 978-1-4471-3236-3. Retrieved 2023-10-26.

[3] Hallgren, Thomas; Carlsson, Magnus (June 6, 2023). "Fudgets Home Page". altocumulus.org. Retrieved October 25, 2023.

[4] Carlsson, Magnus; Hallgren, Thomas (1993-07-01). "Fudgets: A graphical user interface in a lazy functional language". Proceedings of the conference on Functional programming languages and computer architecture. ACM. pp. 321–330. doi:10.1145/165180.165228. ISBN 978-0-89791-595-3. S2CID 9943994.

[5] Burton, F. Warren (1999). "Advanced Functional Programming: Lecture Notes in Computer Science 925 edited by Johan Jeuring and Erik Meijer, Springer-Verlag, 1995". Journal of Functional Programming. 9 (1): 105–111. doi:10.1017/S0956796899223246. ISSN 1469-7653.

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