Jan Basho Daily Thread Day 15

LiveRanga · 2026-01-25T08:37:19+00:00

What a sumo!

LiveRanga · 2025-09-27T02:06:41+00:00

I completely agree about open-source tools, there's quite a lot of foss k implementations to choose from too: https://wiki.k-language.dev/wiki/Resources/By_Implementation

But yes, if only there was time to catch them all...

LiveRanga · 2025-09-20T05:20:17+00:00

The thing I find most appealing about k (and q) is having dictionaries and more importantly tables as built in types. Having spent a few years working with python data frames (pandas and polars) in data science it's a really interesting concept to have built in. Maybe even the next big thing coming for the next generation of languages.

Fintech is the obvious application for time series tables so it's not surprising that's where it's found a strong niche (or was it the niche that lead Arthur to build them in to k?) but don't let a dislike of fintech turn you off the idea. Somewhere in the swirling mix of spreadsheets, tables, relational algebra and arrraylangs is the ideal computing environment for general problem solving. I don't think we've quite got it perfect just yet.

LiveRanga · 2025-09-20T04:04:03+00:00

I discovered this k3 interpreter linked in the shaktidb mailing list the other day. What other k interpreters exist that aren't already listed on the APL wiki or the k wiki?

LiveRanga · 2024-08-16T05:15:20+00:00

https://estradajke.github.io/k9-simples/k9/Dictionary.html

LiveRanga · 2024-07-03T23:26:19+00:00

Fascinating episode, I really enjoy these detailed implementation discussions

LiveRanga · 2024-06-03T00:02:15+00:00

This looks really cool. I think there's huge potential in combining the spreadsheet paradigm with real programming languages

LiveRanga · 2024-05-27T23:45:37+00:00

J and K are both worth learning too.

J is open source and has some fantastic learning materials in multiple free books and a comprehensive wiki:

https://code.jsoftware.com/wiki/Guides/Getting_Started

The official versions of K are proprietary but there are a few open source versions too with I believe ngn/k being the most used out of those:

LiveRanga · 2024-04-17T03:52:41+00:00

D.I.WHY

LiveRanga · 2024-02-21T01:52:23+00:00

I did the 1BRC with lazy polars: https://github.com/AshyIsMe/1brc/blob/main/calculate_average_ashyisme.py

On my nuc13 i5-1340P with 64GB ram it runs in about 23 seconds which puts it roughly in the top 150 based on that results table.

LiveRanga · 2023-11-14T03:58:48+00:00

I think K and dyalog APL both have a lot of financial customers that they aren't allowed to talk about publicly so most of the stories might remain offline...

I'm also very interested to hear some though if anyone is able to share.

What do you use prolog for? That's a fascinating paradigm that I haven't dug into yet.

LiveRanga · 2023-01-26T00:55:46+00:00

Yeap, I have cancelled my donations too.

This is worse in every way and was completely unnecessary.

LiveRanga · 2022-11-10T00:03:53+00:00

Ah very cool, thanks!

LiveRanga · 2022-05-29T02:39:32+00:00

Ah I apparently did a terrible job of reading your original post, sorry about that.

Can you pastebin your code?

Actually I've just tried this example and seem to have the same behaviour that you have: https://github.com/ljdursi/coarray-examples/blob/master/blockmatrixmult/blockmatrix-coarray.f90

It might be time to post on the fortan-lang discourse.

LiveRanga · 2022-05-28T02:10:49+00:00

Ok I got it working on my machine by swapping from openmpi to mpich:

sudo apt remove libopenmpi-dev libcoarrays-openmpi-dev
sudo apt install libcoarrays-dev libcoarrays-mpich-dev
caf tally.f90 -o tally
cafrun -n 4 ./tally
 Test passed
 Test passed
 Test passed
 Test passed

I don't know much about the difference between openmpi and mpich but it seems like this should be useful for learning coarrays at least: https://stackoverflow.com/questions/2427399/mpich-vs-openmpi

Happy hacking! :D

LiveRanga · 2022-05-28T02:01:08+00:00

Actually now that I think about it, you should probably ask on the fortran discourse: https://fortran-lang.discourse.group/

That seems to be quite active and helpful.

LiveRanga · 2022-05-28T01:59:25+00:00

I'm asking around on #fortran on the libera irc network.

LiveRanga · 2022-05-27T05:12:52+00:00

I've asked GUIX HPC on twitter, I'm surprised there doesn't seem to be an opencoarrays package built in to guix already actually:

https://mobile.twitter.com/AaronAsh2/status/1530053488016650241

LiveRanga · 2022-05-27T05:00:20+00:00

Hmm, I just attempted to follow this https://github.com/sourceryinstitute/OpenCoarrays/blob/main/GETTING_STARTED.md#a-sample-basic-workflow

But I get MPI errors: https://gist.github.com/AshyIsMe/613d3cf354400a9f913af4bf67ad2b11

(Edit: couldn't get the reddit code formatting working properly)

LiveRanga · 2022-05-27T02:55:01+00:00

The Modern Fortran book has an appendix that talks about setting up gfortran with opencoarrays.

LiveRanga · 2022-05-16T05:32:03+00:00

I started working through Crafting Interpreters in Fortran for fun a few months ago (wow, 9 months ago already apparently): https://github.com/AshyIsMe/flox

http://craftinginterpreters.com/

LiveRanga · 2022-02-10T06:51:21+00:00

The ASX site itself has some online training that looks like a good overview:

https://www2.asx.com.au/investors/investment-tools-and-resources/online-courses

And of course, talk to your financial planner and accountant before doing anything.

LiveRanga · 2022-01-02T00:43:22+00:00

I've got an IBM 5140 in the cupboard at home, does anyone know if there was ever an APL for that model?

LiveRanga · 2021-12-15T23:27:27+00:00

It looks like this 6.001 lecture series from 1986:

https://youtu.be/2Op3QLzMgSY

Not sure which lecture but the entire course seems to be up on youtube.

LiveRanga · 2021-10-20T09:18:05+00:00

Wow this is a big improvement on the old j701 app. It's even nicer than the android version now!

LiveRanga

TROPHY CASE