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nathan rogers

12:07 AM

trying it now

now that I've had time to think about it, the content of the file would like like something like this

∊'main←{' <content> '}'

because that's how it looks in my of the files for the other languages

so the body would be anything that would fit into the body of a dfn, returning the final expression

but I'm trying what you sent now

Adám

@nathanrogers In that case, you want ⍎⎕FX 1⌽'}arg' 'main←{',⊃⎕NGET'filename'1

nathan rogers

I gues...

ok so say the user type 1+⍳10

Adám

Yes?

nathan rogers

what I do is write that to a file 'main←{\n' + content + '\n}'

so the content is
main←{
content
}

so then the ⎕LX expression, would be something like ⎕LX←'readin in main from file ⋄ main 0'

but because I don't understand ⎕FX, its treating each character as a line?

Adám

12:23 AM

@nathanrogers ⎕LX←'(⍎⊃2⎕FIX'file://filename')0 should work.

nathan rogers

what is file:// relative to?

Adám

Current directory.

nathan rogers

how can I pass an absolute path?

it says "file expected"

Adám

⎕FIX'file://path/to/filename'

nathan rogers

but path isn't relative to where its being run

the path is some fixed point in the filesystem

Adám

12:24 AM

E.g. on Windows, you could do file://C:\mypath\myfile.aplf

nathan rogers

Adám

On Linux, you could do file:///mypath/myfile.aplf

nathan rogers

how do I get environment variables?

Adám

@nathanrogers Did you check APLcart?

If you want a function, and are on 18.0, there's also ⎕SE.Dyalog.Utils.Config

nathan rogers

none of them are what I'm looking for

i'm looking for my system variables

Adám

12:34 AM

@nathanrogers What is the name of the variable you want the value of?

nathan rogers

one that I have defined

Adám

Yeah, what's its name?

nathan rogers

in my .bashrc there are names and I want to know what they are

Adám

Wait, you want the list of all envvars?

nathan rogers

yes

environment variables

Adám

12:36 AM

@nathanrogers Does ⎕SE.Dyalog.Utils.Config⍬ give the result you want?

nathan rogers

⊃↓⍉ ⎕SE.Dyalog.Utils.Config⍬
APPDATA AUTO_PW DYALOG DYALOG_CONFIGDIR DYALOG_SERIAL DYALOG_SHORTVERSION HOME H
OSTTYPE LANG LC_CTYPE LD_LIBRARY_PATH LESSCLOSE LESSOPEN LOGNAME LOG_FILE
LS_COLORS NAME OLDPWD PATH PWD SALTSETTINGSFILE SESSION_FILE SHELL SHLVL
TERM TMUX TMUX_PANE TRACE_ON_ERROR USER USERCONFIGFILE WSL_DISTRO_NAME WSPA
TH XDG_DATA_DIRS _

no, I don't see my names here

the main one I'm looking for is a variable called "server"

it tells me if I'm in the server environment or local to know which directory to find things

and "server" is not in this list

Adám

Which OS is this? Linux?

nathan rogers

its wsl

so yes

ooboonut

Adám

@nathanrogers Does ⎕SH'set' contain the variable?

nathan rogers

ok no, this appears to be returning windows stuff

PATH contains the PATH contents of my windows PATH variable

Adám

12:42 AM

Well, if your environment variable isn't visible to the APL process, then there's not much I can do.

nathan rogers

but ⎕SH 'printenv' gives me what I want

Adám

OK.

nathan rogers

thanks

Adám

Maybe ⎕SE.Dyalog.Utils.Config should use printenv instead of env

nathan rogers

for linux sure

Adám

12:48 AM

Funny, on my WSL their outputs are identical. I'd appreciate a short description of when they differ.

Bubbler

Q: What is the difference between 'env' and 'printenv'?

What is the difference between the two commands env and printenv? They both show the environment variables, and the output is exactly the same aside from _. Are there any historical reasons for there being two commands instead of one?

environment-variables

Adám

@Bubbler I just read through all of the answers there, and I still don't see how they would give significantly different results.

Bubbler

Also found this (no answers, but comments seem to explain the phenomenon)

Adám

@Bubbler That seems to be due to Eclipse being a child of a different process than the shell. However, here, we're talking env and printenv giving different results from identical shells that are both children of the same process.

nathan rogers

@Adám how to print newline?

⎕←'aaaaaaaaa\n'

TryAPL

12:58 AM

@nathanrogers Did you forget to add backticks around your code (`⎕←code`)? You can edit your message and I will edit my reply.

nathan rogers

⎕UCS 13 or something?

Adám

@nathanrogers Yes. Depending on which newline character you are looking for (there are quite a few in Unicode).

nathan rogers

i want \n specifically

Adám

That's ⎕UCS 10

This one is fun.

nathan rogers

OH NO

dyalog's output is going to stderr......

Bubbler

1:05 AM

@nathanrogers Is your server=whatever preceded by export or not?

nathan rogers

but I found it in printenv

oh this is not good at all

why is the output going to stderr

Bubbler

Are you using ⍞ to print something?

nathan rogers

this is the giant header that dyalog prints out on startup

it gets dumped to stderr

so I'm trying to catch stderr and handle it, and this breaks my whole program. I can add a special exception for dyalog, but that's just silly

I could also just dump stderr for this command

but still annoying

Bubbler

Oh, that part

-b: suppress banner in the session

might help

nathan rogers

oh nice

can i do -sb or -s -b

Bubbler

1:17 AM

I'd guess you should -s -b because +s is also a thing

nathan rogers

1:31 AM

Andrew Sengul: April, an APL compiler for Common Lisp

►

in case anyone hasn't seen or heard of april, or who wants to watch a talk on APL stuff

Razetime

2:15 AM

april was quite a hot topic earlier

i think wezl posted this video earlier

nathan rogers

when earlier?

we got an april bot in the discord to test out april stuff

oh but you're in the discord...

I get confused with the name :/

5 hours later…

Razetime

7:24 AM

Google search is so annoying

when i ask for .NET dyalog it gives me a pdf from 14.0

Adám

rak1507

7:52 AM

@Adám which links to help.dyalog.com/15.0/Content/DotNet/Overview/Introduction.htm which is 15.0?

Adám

@rak1507 Oh right. Grrrr. Well, at least we have a plan for fixing that.

rak1507

ah that's good, I've basically stopped using google for APL stuff, ]help is generally more useful it seems (for getting the current version)

Adám

Yup, that's what I use too (and why I made it).

Razetime

8:14 AM

@Adám thanks this is much better

Stack Exchange Feeds

8:49 AM

Q: How can I mask the scan operator in APL?

Assuming I have an array N ← 0 0 0 1 1 1 0 0 1, how can I apply the scan \ to achieve the array 0 0 0 1 2 3 0 0 1? +\N gives me 0 0 0 1 2 3 3 3 4 which is not what I want. +\¨⊆⍨N gives me | 1 2 3 | 1 | which is closer, but then I lose the positions. Is there a way to carry the original values in ...

apl dyalog

4 hours later…

Razetime

1:16 PM

Session file C:\Users\raghu\Documents\Dyalog APL-64 18.0 Unicode Files\def_us.dse saved Fri Sep 17 18:46:20 2021
Can't save - file could not be created.

why am i getting this on the windows ide?

Adám

@Razetime What is your current directory? ]cd

Razetime

C:\Windows\system32

Adám

You need to run in admin mode to write there, but you probably don't want to write there.

Razetime

ah i see

where do i set start directory

do I just ]cd to there and save on exit

Adám

1:36 PM

@Razetime You can change the properties of your Dyalog shortcut. Set "Start in".

@Razetime Yes, or Session>Save As… and choose location.

rak1507

1:50 PM

CMegaC: golf 30×(¯6+(2*1∘+)×3-+⍨-×⍨)÷(⊢×1∘+×(1++⍨)×¯1+3∘×+3××⍨) for positive integers >= 1

xpqz

What the actual... is that?

rak1507

@xpqz I'm currently bored in class

xpqz

What's the class?

rak1507

stats

xpqz

I'm currently bored in a meeting.

rak1507

1:56 PM

from my limited meeting experience, it's hard not to be bored

Razetime

@rak1507 time to boot up my train simplifier

rak1507

if it can simplify that to the 9 character thing I started with, I will be really impressed

Razetime

that is some obfuscation you've done there

dzaima

2:50 PM

@rak1507 (60×3-2∘*×3+×⍨-+⍨)÷(⊢+×⍨)(×-3×⊣××)1++⍨ - just some basic algebraic manipulation

observation

(¯6+(3+×⍨-+⍨)×2*1+⊢)÷1⊥4*⍨⍳

(1⊥(2*⍳)×2*⍨⍳)÷1⊥4*⍨⍳

((1⊥×⍨×2*⊣)÷1⊥4*⍨⊢)⍳

×⍨∘⍳(×÷⍥(+/)×⍨⍤⊣)2*⍳ - equivalent length mess

nathan rogers

3:17 PM

@xpqz I'm currently bored in neither class nor a meeting

does that count?

xpqz

1 hour later…

rak1507

4:37 PM

@dzaima nice, can you get that down to 9?

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