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Raul Miller
10:57 AM
issue with undocumented gl_qwh
I am trying to understand the nature of the undocumented gl_qwh instruction which I see used in the
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issue with undocumented gl_qwh
I am trying to understand the nature of the undocumented gl_qwh instruction which I see used in the
10:57 AM
Robert Herman
, …
Marcin Żołek
11
6:34 AM
Juno - plot, viewmat, and other addons and packages
Thank you for this interesting information about colormap analysis and their lightness plots. I will
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Juno - plot, viewmat, and other addons and packages
Thank you for this interesting information about colormap analysis and their lightness plots. I will
6:34 AM
John-Philip Butler
, …
Devon McCormick
6
Jun 4
spx - how to use another locale than base?
My projects change on almost every run: input data mostly stays fairly constant, whereas the
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spx - how to use another locale than base?
My projects change on almost every run: input data mostly stays fairly constant, whereas the
Jun 4
Richard Vaughan
, …
Yuvaraj Athur Raghuvir
5
Jun 3
J 9.7 rejected by antivirus software
I set an exception for j.dll in McAfee Quarantined files to run J9.7 and J9.8 beta on Win 11. On Wed,
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J 9.7 rejected by antivirus software
I set an exception for j.dll in McAfee Quarantined files to run J9.7 and J9.8 beta on Win 11. On Wed,
Jun 3
Arie Groeneveld
, …
Henry Rich
5
Jun 2
JE crash with fold (F) in timex
Fixed for the next beta. 6!:2 did not set up correctly for handling {{ }} . Henry Rich On 5/31/2026 8
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JE crash with fold (F) in timex
Fixed for the next beta. 6!:2 did not set up correctly for handling {{ }} . Henry Rich On 5/31/2026 8
Jun 2
John Baker
, …
Pascal Jasmin
5
Jun 1
s: going away in next version of J
please delay erasing symbols until jdict is more mature. Thank you for items function. the comments
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s: going away in next version of J
please delay erasing symbols until jdict is more mature. Thank you for items function. the comments
Jun 1
Mike Chris
,
Michael Day
5
Jun 1
J Collection of Tasks with comparison to other languages RosettaCode
Hi, I have implemented some of your suggestions. https://code2compare.com/j (you may need to press
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J Collection of Tasks with comparison to other languages RosettaCode
Hi, I have implemented some of your suggestions. https://code2compare.com/j (you may need to press
Jun 1
Raul Miller
,
Devon McCormick
3
May 31
J labs (as of summer 2026)
Devon, I have used the labs at various points. I am currently trying to update a lab which was
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J labs (as of summer 2026)
Devon, I have used the labs at various points. I am currently trying to update a lab which was
May 31
rsy...@disroot.org
, …
Michael Day
9
May 25
stat/base regression disappointment
Michael Day <mike_l...@tiscali.co.uk> wrote: > > First, I think it's worth
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stat/base regression disappointment
Michael Day <mike_l...@tiscali.co.uk> wrote: > > First, I think it's worth
May 25
Thomas McGuire
, …
Mike Day
30
May 22
J version of Pi Agent Harness
Thanks, Henry I neither enjoy nor shine in zoom-like sessions, but would appreciate access to the
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J version of Pi Agent Harness
Thanks, Henry I neither enjoy nor shine in zoom-like sessions, but would appreciate access to the
May 22
Eric Iverson
, …
Yuvaraj Athur Raghuvir
12
May 20
ArrayCast Episode 124: J 9.7 with Henry Rich & Marcin Żołek
Yes, this is the clue I am looking for to run media transformation programs like ffmpeg from my J
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ArrayCast Episode 124: J 9.7 with Henry Rich & Marcin Żołek
Yes, this is the clue I am looking for to run media transformation programs like ffmpeg from my J
May 20
William Szuch
, …
chris burke
4
May 18
J8.8 Beta3 - addons/api/curl
Fixed, thanks for pointing it out. On Tue, May 19, 2026 at 9:50 AM William Szuch <bszuch@wsa-
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J8.8 Beta3 - addons/api/curl
Fixed, thanks for pointing it out. On Tue, May 19, 2026 at 9:50 AM William Szuch <bszuch@wsa-
May 18
William Szuch
, …
Eric Iverson
9
May 18
Jd - error on load
Jd bug prevents automatically installing a new evaluation key. Install one manually as follows: ***
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Jd - error on load
Jd bug prevents automatically installing a new evaluation key. Install one manually as follows: ***
May 18
Eric Iverson
May 15
J9.8.3 beta release available
Release notes: https://code.jsoftware.com/wiki/System/ReleaseNotes/J9.8 To upgrade from previous beta
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J9.8.3 beta release available
Release notes: https://code.jsoftware.com/wiki/System/ReleaseNotes/J9.8 To upgrade from previous beta
May 15
Skip Cave
, …
Don Guinn
12
May 14
Factoring large integers
Thank you Henry for politely reminding me to test before going off half-cocked on an idea. I had not
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Factoring large integers
Thank you Henry for politely reminding me to test before going off half-cocked on an idea. I had not
May 14
Yuvaraj Athur Raghuvir
, …
Marcin Żołek
5
May 13
Addon question: base library csv script or tables/csv addon ?
The J Wiki has just been updated, so that outdated information is no longer there. Most addons
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Addon question: base library csv script or tables/csv addon ?
The J Wiki has just been updated, so that outdated information is no longer there. Most addons
May 13
Thomas McGuire
, …
bill lam
8
May 12
Mac Apple Silicon JQt build.
Does Apple M2 have rosetta ? Can you try run on J bin folder the following command? arch -x86_64 ./
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Mac Apple Silicon JQt build.
Does Apple M2 have rosetta ? Can you try run on J bin folder the following command? arch -x86_64 ./
May 12
Thomas McGuire
May 11
Yet another MCP server with J
I saw the recent tangentstorm MCP server for J access. This one is a bit different. I had Claude Code
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Yet another MCP server with J
I saw the recent tangentstorm MCP server for J access. This one is a bit different. I had Claude Code
May 11
Eric Iverson
,
Marcin Żołek
2
May 10
J9.8.2 beta release available
This beta introduces the new viewmax addon, a significant extension of viewmat. viewmax enables
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J9.8.2 beta release available
This beta introduces the new viewmax addon, a significant extension of viewmat. viewmax enables
May 10
Henry Rich
May 10
Protocol for closing GitHub issues
If there is a generally accepted way of closing GitHub issues, please enlighten me. Failing that, I
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Protocol for closing GitHub issues
If there is a generally accepted way of closing GitHub issues, please enlighten me. Failing that, I
May 10
Richard Donovan
, …
Michael Day
6
May 7
I can't find this function!
Thanks everyone! Rauls second offering seems to be the one I want but I will enjoy trying all the
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I can't find this function!
Thanks everyone! Rauls second offering seems to be the one I want but I will enjoy trying all the
May 7
Henry Rich
,
Marcin Żołek
2
May 6
Community project? Tutorial Videos
A good example of such an activity is New York City J Users Group. For the past 20 years, NYCJUG has
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Community project? Tutorial Videos
A good example of such an activity is New York City J Users Group. For the past 20 years, NYCJUG has
May 6
Richard Donovan
, …
Remington Furman
7
Apr 30
Fw: Last digits of prime numbers
It has also been suggest that some digits are more likely follow other digits than seems random. EG 1
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Fw: Last digits of prime numbers
It has also been suggest that some digits are more likely follow other digits than seems random. EG 1
Apr 30
J. Patrick Harrington
, …
bill lam
6
Apr 29
Creating a directory
That would work but it fails to create intermediate folders. The verb mkdir_j_ is available for that
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Creating a directory
That would work but it fails to create intermediate folders. The verb mkdir_j_ is available for that
Apr 29
John Baker
, …
Henry Rich
11
Apr 28
9.7.1 rxapply problems
What does 'broken' mean? With u, rxapply fails when you give it a local name. If that's
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9.7.1 rxapply problems
What does 'broken' mean? With u, rxapply fails when you give it a local name. If that's
Apr 28
Michal Wallace
,
bill lam
3
Apr 27
a matrix decomposition story
Yes. It wasn't actually the decomposition I thought it was. I just got sidetracked trying to do
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a matrix decomposition story
Yes. It wasn't actually the decomposition I thought it was. I just got sidetracked trying to do
Apr 27
Cameron Chandoke
, …
Henry Rich
33
Apr 26
Trying to diagnose issue with tacit recursion $:
Consider a similar question about the grammar of English: what does 'itself' mean? It helps
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Trying to diagnose issue with tacit recursion $:
Consider a similar question about the grammar of English: what does 'itself' mean? It helps
Apr 26
Michal Wallace
,
LdBeth
3
Apr 25
prototype mcp server for using J from LLMs
After used this for a while, I think some tweaks to the prompt need to be made to remind the LLM
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prototype mcp server for using J from LLMs
After used this for a while, I think some tweaks to the prompt need to be made to remind the LLM
Apr 25
Eric Iverson
,
Daniel _
2
Apr 21
J9.7.1 release available!
Hi, I am trying to make a J package for Guix, but I cant find the branch or release on github for 9.7
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J9.7.1 release available!
Hi, I am trying to make a J package for Guix, but I cant find the branch or release on github for 9.7
Apr 21
Thomas McGuire
, …
Thomas McGuire
7
Apr 17
interleave matrix columns
I like var 1 since it fixes my box/unbox and calculates the size and still uses the MRG Var 2 I was
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interleave matrix columns
I like var 1 since it fixes my box/unbox and calculates the size and still uses the MRG Var 2 I was
Apr 17