<sapientech>OrangeShark: yeah looking forward to seeing what it can do/what can be improved <davexunit>there's certainly much to improve upon, and I don't have much time! ***jason` is now known as turbofail
<jmd>Does (file-exists? "/foo") return true if "/foo" is a directory? <jmd>(Yes, I did look up file-exists? in the manual before asking this question) <brendyn>jmd: Open up a terminal and run guile <brendyn>then type (file-exists? ".") (file-exists? "Desktop") (file-exists? "stnzrstdaret") <brendyn>Or something like that. Works for me. <jmd>Yeah, I did that too. And got the same results. <jmd>I was hoping that someone knowledgeable however could shed some light on exactly what is meant by "file" in this context. For example, what if it is a symlink? Will it test the existence of the link dest or what? <jmd>Of course I could look in the Guile source too ... <wingo>fibers is coming along :) just need the ability for a scheduler to stop when there's nothing left to do and i can finally write tests <wingo>channels seem to be working tho, as are cross-kernel-thread communications between fibers on different schedulers <mikebelanger>Which is pretty awesome, because I'm looking for some kind of lisp-to-javascript ideas, without all the Java-overhead associated with Clojure. <mikebelanger>But I can't seem to find a lot of projects using Guile to compile down to Javascript. Am I missing something, or can Guile compile a javascript file relatively easily? I'm cool with writing DOM helper functions or whatever. <davexunit>mikebelanger: the purpose of ecmascript on guile is not to compile guile to javascript, but to run javascript on the guile vm <mikebelanger>davexunit: Right -- and I'm wondering, what's to stop someone from writing functions/macros to compile Guile back to Javascript? Or is it just impractical? <mikebelanger>I suspect there's a reason no one has tried compiling down to Javascript, I just can't figure out the reason <davexunit>ijp has written the beginnings of a guile->js compiler <davexunit>it's certainly possible to do, but it's a lot of work <amz3>bad news is that a big part of the work ijp has done is offline <amz3>mikebelanger: I don't know why <amz3>sure it's a very interesting project, I would be one of the first to test it and give feedback if that's the trouble <amz3>TBH I tried the link you provided I even found a revision where things were kind of working <amz3>I fixed some cosmetic bug and that is all, I have basically zero knowledge of guile compiler <amz3>to share some more xp, I've done a similar work with Python (compile Python to Javascript) and it's a lot of work <amz3>I think scheme would be simpler to translate but you still need to know which are the basic vm op for doing the translations <amz3>AFAIK there is no such documentation, it's only in the source code somewhere <OrangeShark>Does anyone use the ecmascript language on guile? I don't recall seeing anyone actually use it. <OrangeShark>ah okay, so probably more serious work needs to be done to make it more usable in general? <mikebelanger>amz3: right - makes sense. Javascript has such a chaotic syntax too, it would take quite a bit of work. <amz3>mikebelanger: no that is not the difficult part <amz3>scheme->javascript is easier than javascript->scheme IMO <amz3>you only have to parse scheme, that is done by the vm somewhere <mikebelanger>amz3: What's the difficult part then? Especially if Guile can already understand ECMAscript, which is more or less a standardized version of Javascript <paroneayea>there is a scheme->javascript branch that ijp started last year <amz3>mikebelanger: for me, it's knowing which vm op to implement in javascript <paroneayea>it might be nice also to look at how feasible it is to do scheme->webassembly <davexunit>mikebelanger: there are many primitive operations that need to be implemented in javascript <davexunit>how does one implement dynamic-wind in javascript, for example. <amz3>after i release culturia 0.1 I'll have a look again at scheme->javascript <mikebelanger>davexunit: amz3: cool, thanks for the responses. I knew there was a good reason I didn't see anything like this! <amz3>mikebelanger: that said there is a scheme interpreter written in javascript <davexunit>I personally would love to be able to run my guile programs in a browser <mikebelanger>I've been using Clojure(script), but there's just so much configuration/overhead associated with it. <OrangeShark>amz3: probably the steps that need to be done is libgit2 bindings, gitweb replacement, a bunch of web related libraries, github replacement <OrangeShark>I think I have also seen parenscript popular with some common lisp lispers <ijp>I can't really work on guile->js until winter, either <codemac>wingo: for fibers, I'd like to help contribute tests. Any example projects / tests that are formatted well for you? <amz3>... I can't paste stuff in my REPL <amz3>I finally got the point where my graph library is useable <amz3>they are still quirks tho... <amz3>it's adapted from another article using Java <zv>hey guys, i was wondering if anyone had a better/cleaner idea to pull a string pair out of a list of string->value pairs <zv>e.g to extract "NETWORK"-"freenode" '(("THING" "thong") ("VERSION" "1.0219") ("CTKNET" "921") ("NETWORK" "freenode") ("CHANS" "1928")) <zv>it appears alist operations dont work here <zv>actually i'm getting that as one big string and then splitting <civodul`>sneek: later tell amz3 nice post on the graph db! <paroneayea>the future of the federated social web will have an emacs interface :) <civodul`>it's good to see formal W3C work on this too <paroneayea>that should be a conference talk submission title for me, huh <paroneayea>social working group charter runs out in end of 2016 <paroneayea>I have until then to get this spec to recommendation status <paroneayea>which is why I've dropped the ball on everything except activitypub / pubstrate / soci-el <paroneayea>I can only work on the standard and its implementations <paroneayea>but! for the sanity and future of the intarwebs! <paroneayea>and hey, the proto implementation being in guile is still leading to some nice things <paroneayea>civodul: I now have signed cookie based sessions, and I have a forms library <paroneayea>it does use goops though, since generic methods is great there <paroneayea>because I feel like you don't like GOOPS civodul! :) <civodul>i think i've said it too much and now people feel compelled to justify why they use it <paroneayea>I know you used to love it and it feels like you don't love it anymore! ;) <paroneayea>but in-between panic attacks, I am getting a lot done ;) <paroneayea>back to it! thanks for the chat, it helped my confidence civodul :) <paroneayea>I suspect I'll have at least 2 users of the emacs of social networking at least :) <paroneayea>civodul: I'll take you up on it when I get it to that point :) <paroneayea>that's one way to probably get an initial beta audience... <paroneayea>it'll be way easier to do guix packages now that I'm not relying on all that python malarky ;) <rekado>zv: (and=> (assoc-ref the-big-alist "NETWORK") car) <mark_weaver>rekado: I didn't read the entire log, but there _are_ environment variables that openssl consults, iirc. <mark_weaver>however, there are none that are supported by GnuTLS iirc. GnuTLS needs a more complex (though probably better) setup to enable per-user CA certificate stores, which is something that Fedora does iirc. this is all from vague memories of me investigating this issue long ago. there's a thread on guix-devel about it years ago. <spauldo>I got a question regarding style. I'm writing up a basic mathematical vector library, but I want to be able to create vectors in both polar and component form. I need to be able to distinguish between the two. <spauldo>Right now, the vectors are just lists, but there's no way programmatically to tell the difference between (x y) and (magnitude direction). <spauldo>I can throw a symbol in there as a third value in the list to designate, but I'd like to know if that's the common way of doing things. <spauldo>Basically, what's the idiomatic scheme way of adding type information? <mark_weaver>spauldo: but nowadays, most modern schemers would probably use records instead, yeah. <spauldo>I haven't considered records... I'll check into that. <mark_weaver>we usually prefer SRFI-9 records unless there's a need for something else. <spauldo>most of my early scheme knowhow came from the SICP videos, so I tend to default to lists for everything. I probably need to read more scheme code. <OrangeShark>spauldo: you can also look into GOOPs, specifically generic functions <spauldo>thanks for the SICP link - that's right on topic for what I'm wanting to do. <spauldo>I've never looked much at GOOPS, records, or really any of the other data structures because I mostly just use scheme for numerical problems. I ran into a problem where FORTRAN wasn't giving me answers. Guile hasn't failed me yet. <spauldo>the numerical tower is the killer feature as far as I'm concerned. <ijp>we look forward to failing you soon <spauldo>I look forward to finally learning enough math to be able to stump scheme :) <ijp>according to riastradh, I made some flippant remark that scheme should support integration, but I think scmutils can do that <ijp>well, often enough anyway <mark_weaver>I don't know about symbolic integration, but I don't remember seeing it in scmutils the last time I looked (years ago) <spauldo>I watched the SICP video where they implemented symbolic integration, but haven't had time to try any of that. I've been thinking of trying out Maxima. <ijp>I remember differentiation, but not integration <mark_weaver>I've used Maxima extensively in the past, and even contributed to it. it has a pretty good symbolic integrator. <ijp>symbolic integration is much harder than symbolic differentiation <spauldo>maybe it was just differentiation... I was paying more attention to the whole skeleton system than the actual rules <ijp>it's why I can buy a book called "inside interesting integrals" but not "diving deep with delightful derivatives" <mark_weaver>I've even occasionally thought about implementing just enough Common Lisp on top of Guile to allow it to run Maxima. <ijp>spauldo: it may interest you to know that symbolic differentation was essentially the reason mccarthy created lisp <ijp>I think it's a single digit AI lab report <mark_weaver>Maxima's ancestor Macsyma was originally written in Maclisp iirc, and although it has since come to use a few Common Lisp features, most of the code uses only old Lisp features. <spauldo>really? I knew he was wanting to do stuff with lamda calculus, but I assumed it was for number theory or something. <spauldo>my school doesn't give me access to any journals. <ijp>ftp://publications.ai.mit.edu/ai-publications/pdf/AIM-010.pdf <spauldo>not because they don't have access to them, but because I can't get my advisor to get off his butt and hunt down the account information <spauldo>oh, I think I've seen these before, but I forgot about them. Good deal, that's getting bookmarked. Thanks for the link. <spauldo>this is interesting. It looks like early versions of LISP had commas between list items. <ijp>there used to be M-expressions and S-expressions <ijp>at least in theory, I don't think M-expressions were ever implemented in LISP <mark_weaver>iirc, the original plan was that S-expressions would just be an intermediate form in the lisp implementation <mark_weaver>there have been many proposals over the years for a nicer form for use by humans, but they have all failed to catch on. <spauldo>I've seen at least one of those. A guy came up with what is basically lisp without parentheses. Then he proceeded to try to teach various CS concepts using it. I tried to follow along, but the lack of parens was driving me nuts. <spauldo>guess it's all about what you're used to. <ijp>and humans can get used to pretty much everything <spauldo>I spend a good portion of my day using greek letters and various mathematical symbols, so APL probably wouldn't be too hard to get used to. <ijp>my analysis lecturer had a habit of using weird symbols like "car" and "tree" and a heart on valentines day <spauldo>another reason I jumped ship from fortran - it's nice to use thetas and phis instead of having to type them out <ijp>and I shit you not when I say I've used greek, korean and futhark in the same piece of mathematics <ijp>at some point I should have just given up and used words like a grown up <spauldo>you could always just do it all in korean. You're not likely to run out of characters there. <ijp>I could, but it was only halfway through I realised I needed another script <spauldo>IIRC the average Japanese adult knows about 5000 kanji symbols, and I think korean uses more or less the same set of symbols <ijp>south korea hasn't renounced all use of chinese characters, like norht korea has, but they have an alphabet called hangul 