freenode/#lisp - IRC Chatlog

19:02:31 jackdaniel hey. I want to write a fast function which does alpha-composition between two rgba pixels, here's what I've got: http://ix.io/1kSL/lisp

19:02:45 jackdaniel I'm not very good with bit fiddling so I'd appreciate any hints how I could improve this code

19:03:39 jackdaniel (whole functions works on two arrays of course)

19:28:42 fe[nl]ix lisper29: that would be me

19:32:50 [X-Scale] ** NICK X-Scale

19:38:08 _death jackdaniel: look-up tables would be an easy way, though not the fastest

19:43:14 jackdaniel _death: thanks. it is internal function because I care about speed in there (it is for McCLIM framebuffer image rendering)

19:43:40 jackdaniel I'll look up the look-up tables though, may be useful for testing if I didn't mess things up

20:08:10 aeth pierpa: I'd handle binary infix like this. https://gitlab.com/snippets/1747127

20:10:56 dale_ ** NICK dale

20:19:35 funnel_ ** NICK funnel

20:20:52 Xach jackdaniel: i like http://alvyray.com/Memos/MemosCG.htm

20:21:00 Xach jackdaniel: not an instant or direct ref, sorry

20:28:24 lacedaemon ** NICK fe[nl]ix

20:54:03 fouric question: i have ``(foo ,,(+ 1 2)) which yields `(FOO ,3) but i want `(FOO 3), what do i need to do differently

20:54:55 fouric for reasons beyond my ability to fathom, ``(foo ,(+ 1 2)) => `(FOO ,(+ 1 2))

20:55:28 Shinmera Just `(foo ,(+ 1 2)) ?

20:55:34 Shinmera Why are you using double backquotes

20:55:53 fouric `(foo ,(+ 1 2)) => (FOO 3) which is not what i need

20:56:10 Shinmera `'(foo ,(+ 1 2)) then

20:56:11 fouric i'm using double backquotes because it's part of a larger macro that i cut down

20:56:32 fouric `'(foo ,(+ 1 2)) => '(FOO 3) which doesn't allow for more unquoting

20:56:47 Shinmera Sigh

20:56:51 Shinmera ``(foo ,',(+ 1 2)) then

20:57:22 Shinmera `(FOO 3) and '(FOO 3) are equivalent. If you "Need more unquoting" you should post a better example

20:57:42 fouric hm, ok

20:58:02 fouric i was trying to be concise to save people time but i guess context is needed

20:58:22 ebrasca Can I get donations for developing mezzano?

20:58:57 fouric https://gist.github.com/fouric/6213a6046cfbe4aa213aef2f7dd66f1c

21:00:04 Shinmera You could use (list 'gethash ,keyword ,sym) or, as I pointed out above, `(gethash ,',keyword ,',sym)

21:00:37 Shinmera mm, *(list 'gethash ',keyword ',sym)

21:03:25 fouric neither of those work unfortunately - should i just give up on quasiquote and use LIST etc. instead?

21:03:53 fouric that is, am i trying to do something that fundamentally cannot be done with quasiquote

21:05:03 Shinmera It can be done and I told you how. Maybe you're asking the wrong question, and besides that your function looks really weird. How do you hope to gethash from a variable that you just gensym up?

21:05:48 Shinmera Oh wait, you gensym-- ok

21:06:21 Shinmera Hold on.

21:08:14 Shinmera https://gist.github.com/fouric/6213a6046cfbe4aa213aef2f7

21:08:35 Shinmera No wait, still not right. It's too late to do this.

21:08:49 fouric sorry i'm a bad macro writer

21:09:03 fouric still not used to thinking about multiple levels of syntax expansion at once

21:09:45 Shinmera There we go, updated the comment. That should be right.

21:10:48 fouric that is some LOOP black magic right there

21:10:50 fouric thank you!

21:10:59 Shinmera Not really

21:11:15 Shinmera I just don't like mapcar for anything that isn't already a toplevel function

21:11:52 Shinmera You could also do this with an flet instead of a macrolet.

21:12:15 fouric oh, that makes sense

21:12:26 fouric unfortunately the macro does not actually expand properly

21:12:30 fouric flet...

21:13:06 fouric oh, the reason i was using macrolet was because i was going to SETF the resulting expansions

21:13:51 Shinmera You can still do it with flet. And also the expansion of my version works just fine.

21:14:48 Shinmera Here's an flet version. https://gist.github.com/fouric/6213a6046cfbe4aa213aef2f7dd66f1c#gistcomment-2685378

21:16:35 aeth ebrasca: If you want money for Mezzano I'd recommend refocusing the project to be a cloud OS for deploying Lisp applications. e.g. https://en.wikipedia.org/wiki/Unikernel

21:16:52 fouric you're right, it does work fine

21:16:54 fouric totally my b

21:17:09 fouric i left some stuff around in the REPL i was testing it with

21:17:22 Josh_2 hey so neither slime or sly are connecting to the sbcl backend, although sbcl is launching in another buffer on my Emacs

21:17:26 fouric ty Shinmera

21:17:31 Shinmera sure

21:17:31 fouric much appreciated

21:17:47 Josh_2 Getting this error (("Error in timer" sly-attempt-connection (#<process inferior-lisp> nil 3) (void-function set-up-sly-ac)))

21:17:50 aeth ebrasca: e.g. get a server Mezzano running on a cloud provider and you just virtualize your Lisp server application on Mezzano.

21:21:01 fouric ebrasca: do you have a bountysource thing set up or something?

21:21:52 ebrasca fouric: I am contributor to mezzano. I don't think there is bountysource or sometink like this.

21:22:39 ebrasca aeth: Mezzano can run on qemu , kvm and have single address space.

21:22:43 lumm_ ** NICK lumm

21:23:21 no-defun-allowed Good morning everyone!

21:23:31 ebrasca aeth: Today I have fix problems with tcp ip in mezzano.

21:23:58 aeth ebrasca: Does it run in a non-graphical mode?

21:24:07 aeth ebrasca: And does it support SSH?

21:25:46 aeth ebrasca: I would go the Ubuntu route and have a Server version and a Desktop version. In fact, Ubuntu also has a Cloud edition, which is probably a modified Server edition that's tested on various cloud providers.

21:25:46 ebrasca aeth: I can connect to it with slime.

21:25:51 ebrasca aeth: froggey say it is relativeli easy to make it non-graphical.

21:26:45 aeth ebrasca: You'd probably want to tunnel SLIME over SSH or something else that's encrypted.

21:27:26 aeth ebrasca: If I were you I'd put together a list of proposed server/cloud features and see if anyone is interested in Mezzano as a server.

21:27:34 fouric ACTION raises hand

21:28:46 ebrasca fouric: Do you have someting in mind?

21:31:55 ebrasca aeth: I can make this list.

21:32:15 ebrasca aeth: How to find interested people in Mezzano as a server?

21:33:02 aeth ebrasca: Make a blog post about Mezzano-as-a-server and see if it gets featured on Hacker News, /r/programming, comp.lang.lisp, etc.

21:33:54 aeth You probably need two lists. What it does now and what it should do in the future.

21:35:04 aeth You should probably have someone proofread a draft here first.

21:36:28 aeth You should also try to get it running on a cloud platform if there are cloud platforms that let non-Linux OSes run on them. You'll need to have an encrypted way to connect to it first, though.

21:38:26 aeth If it can run a CL web server you'd probably want to put the Mezzano web server behind another server that runs a mature web server like nginx. I'm not a cloud person, though, so I'm not sure how that works.

21:39:20 ebrasca Mezzano have tcp/ip wichout retransmission.

21:40:12 ebrasca It can read and write to fat32 (Probably not optimized).

21:48:15 ebrasca aeth: Do you mean someting like tcp with retransmission , ssh and hunchentoot ?

21:49:56 aeth ebrasca: yes

21:52:31 aeth ebrasca: If there's any money in Mezzano it's in servers and cloud. No one (or close enough to no one) is going to switch their client from Windows or Android.

21:52:46 aeth But servers can run anything.

21:53:51 aeth I would personally focus on the network stack and remote access for now. Linux was a stable server OS long before it was a stable desktop one.

21:55:20 ebrasca aeth: Yea I am alredy focus in tcp/ip.

21:55:55 aeth Don't forget UDP.

21:56:07 aeth Almost everything is either TCP or UDP afaik.

21:56:50 ebrasca I have done some ARP.

22:04:10 ebrasca aeth: Thank you!

22:04:32 aeth You're welcome.

22:05:24 aeth ebrasca: I think the time to post about this is when you have a working proof of concept of Mezzano running as a server.

22:06:26 aeth That's all but guaranteed to make it to the front of Hacker News and /r/lisp and has a decent chance of making it to /r/programming. Your pitch for donations or bug/feature bounties or Mezzano-as-a-service or whatever can go at the bottom of the post.

22:07:44 aeth (If a web server is too hard you can think of something simpler. You're already almost there by having SLIME run.)

22:40:11 White_Flame ebrasca: and you should set up the means for accepting donations (paypal button, patreon, etc) before such an announcement.

22:43:42 lumm_ ** NICK lumm

23:46:09 |3b|` ** NICK |3b|