Finite State Machines in Forth (1995)(galileo.phys.virginia.edu) |
Finite State Machines in Forth (1995)(galileo.phys.virginia.edu) |
The specific example is of number input routine allows signed decimal numbers without power-of-10 exponents (fixed-point, in FORTRAN parlance) and comes from the author's book Scientific Forth, where a fuller example is used ... to determine whether a piece of text is a proper identifier (that is, the name of a variable, subroutine or function) according to the rules of FORTRAN.
I originally heard of Scientific Forth from Programming in the Twenty First Century where it made a list of "Five Memorable Books about Programming"[3] with the following description:
Dr. Noble demonstrates how he uses Forth for hardcore matrix work and, when he realizes that RPN notation isn't ideal in all circumstances, develops a translator from infix expressions to Forth.
[0]: https://news.ycombinator.com/item?id=22746708
[1]: https://news.ycombinator.com/item?id=22748785
[2]: previously 3, 6 and 8 years ago, never any comments: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
[0] https://github.com/Josefg/Scientific_FORTH [1] https://github.com/Josefg/Scientific_FORTH/blob/master/Conse...
While it isn't too active, the most recent activity was in the last week or so, I think all that remains are some figures and tables for a couple chapters, the index and proof-reading[0]. It's very nearly there due to a lot of work on Josef's part.
Thanks!
https://en.wikipedia.org/wiki/The_Gospel_of_the_Flying_Spagh...
https://en.wikipedia.org/wiki/Finite-state_machine
From there you can deep dive into subjects like digital logic and automata theory.
Didn't mean no harm :)
I'm not jealous and don't think I would bear working like that every day for months. Take a hard look and try to build software with Forth before you try to use it professionally.
FORTH ?KNOW IF HONK ELSE FORTH LEARN THENCodebase size? Entropic/organizational complexity? Word style? Environment (custom/standard)? Standard(s) used? Ease of debugging? Testing methodology used?
I most definitely am not literally asking for answers to this set of questions (considering the cases of a bank and an industry that presumably doesn't want to be known for its software) - I guess I'm just being exact in the gist of my curiosity :)
The only interesting illustrative example I can provide is that Mattel once used Forth for its toys (quoting previous times I mentioned this: https://news.ycombinator.com/item?id=21823216, https://news.ycombinator.com/item?id=17755287)
I don't know of any recent case studies.