#objecticon — Public Fediverse posts

I have added #ObjectIcon and #ATS --
https://rosettacode.org/wiki/Bernstein_basis_polynomials#ATS

#ATSlang #FunctionalProgramming

Addendum: Others have been adding examples, too, so far in languages with which I am unfamiliar.

Anti-aliased straight line drawing, implemented in #ObjectIcon (using the drawing of individual pixels, rather than cheating):

Xiaolin Wu's line algorithm - Rosetta Code https://rosettacode.org/wiki/Xiaolin_Wu's_line_algorithm#ObjectIcon

#RosettaCode

(I discovered (a) that ‘variable’ does what Parlett documented, even though it is different from what ‘variable’ does in Icon; (b) there are major bugs in ipl.math(ExtMath). I have marked them ‘SEVERE BUG’ in my issues tracker. Easy to fix, but not today.)

A new entry for #ObjectIcon --

Euler method - Rosetta Code https://rosettacode.org/wiki/Euler_method#ObjectIcon

#Icon #ObjectOriented #GoalDirected #EulerMethod #DifferentialEquations

I hope that so far I have AT LEAST done enough to prevent #ObjectIcon disappearing into nowhere.

Now I have to go mention the new repo on #RosettaCode. I’ll just make a handwritten note, for now.

Of course, any RC contributor can make the changes. But one shouldn’t give the impression I plan to be a ‘maintainer’. I’m an older, disabled person simply providing the thing in the most forkable way.

(Were it my own project, it would surely be in a Mercurial archive, not Git.)

Come get your #ObjectIcon sources, people! A #programming #language you probably do not yet know: https://github.com/chemoelectric/objecticon

Easier to learn if you already know #Icon or #Unicon. Also if you know #Prolog or #Mercury, which are other languages that have goal-directed evaluation (which which are declarative, whereas the Icon family are procedural).

(Please fork rather than expect support, though. I am an elderly disabled person.)

#ObjectIcon is one of those compilers that installs an executable as intermediate code with a shebang header that runs the intermediate code interpreter. So oipatch is something to rewrite the shebang header to point to a different location for the interpreter.

With that, you can do a staged install.

As it current comes (but perhaps not after I make changes, if I get to doing that), Object Icon is meant to be run where you built it. To me, that’s not acceptable.

Here is how I decided to work monotonic cubic splining (for color gradients) straight into the #ATS program:

chemoelectric / mandelbrot-viewer / [d4995d] /pchip2c.icn.m4 https://sourceforge.net/p/chemoelectric/mandelbrot-viewer/ci/default/tree/pchip2c.icn.m4

That is an #Icon/#Unicon program (or #ObjectIcon, depending on #m4 settings). What it does is take the output of passing the original PCHIP (not any of the derivatives) through f2c and make it buildable without f2c.h or libf2c.

Then I simply link the #ATS with that C code.

Mandelbrot set - Rosetta Code https://rosettacode.org/wiki/Mandelbrot_set#ObjectIcon

#Mandelbrot #MandelbrotSet #ObjectIcon #RosettaCode #ComputerProgramming

I went ahead and wrote a Virtual Machine to #ATS translator for the #RosettaCode #compiler task series:

Compiler/virtual machine interpreter - Rosetta Code https://rosettacode.org/wiki/Compiler/virtual_machine_interpreter#Compiler

The thing’s designed to make it relatively easy to handle many other languages. Languages with #goto should be easy to do, for instance: convert the program to one procedure with a lot of goto in it. And #Scheme could be done easily. I have ideas for #ObjectIcon and co-expressions.

#FunctionalProgramming

I have added #ObjectIcon --
https://rosettacode.org/wiki/Modular_arithmetic#ObjectIcon

#RosettaCode #ProceduralProgramming

(I will not call this an example of #LogicProgramming, given that I never use goal-direction or failure in any significant way. But #ObjectOriented does apply.)

And #ObjectIcon --

https://rosettacode.org/wiki/Modular_inverse#ObjectIcon

Oh, and any #ObjectIcon user (if there be any other than I) might find this useful: https://bitbucket.org/chemoelectric/chemoelectric-overlay/src/master/dev-lang/objecticon/files/oipatch.icn

It is needed by the Gentoo ebuild for staged installation. Icon-folk don’t think a lot about the needs of people doing installation.

Now I have done the #ObjectIcon --

https://rosettacode.org/wiki/Modular_exponentiation#ObjectIcon

I hope to one day host the Object Icon sources myself, but you can get the last version by the author at Sourceforge. And my ‘chemoelectric’ overlay has a live ebuild for Gentoo. (I should make a ‘dead’ ebuild with a date as version, since the sources are no longer changing unless I make the changes.)

#RosettaCode

BTW a fourth method, beyond closures, inheritance, and unlimited polymorphism, is the co-expressions of #ObjectIcon and #Icon. Which I used, for those languages. (Also #Unicon)

A fifth option would be practically anything you can think up that uses call-with-current-continuation in Scheme. But I did the #Scheme with closures. :)

(Side note: neither the Icons nor standard Scheme have run-time type safety. So the Python method would have worked, too)

My #ObjectIcon translated from #Dlang was a complete botch. It gave wrong answers! So I deleted it. But this #Icon code works:

https://rosettacode.org/wiki/Continued_fraction/Arithmetic/G(matrix_ng,_continued_fraction_n)#Icon

(To use it as ObjectIcon code would require a few tiny changes.)

It is not too often that I add a #Dlang example to #RosettaCode :

Continued fraction/Arithmetic/G(matrix ng, continued fraction n) - Rosetta Code https://rosettacode.org/wiki/Continued_fraction/Arithmetic/G(matrix_ng,_continued_fraction_n)#D

In fact, I think this is just the second time. I do not like this style of programming (even though #ObjectIcon is much alike and I hope to be its advocate in the absence of its author).

Yesterday I added a second #Scheme implementation (I also did the first) and #CommonLisp for this task.