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00:10 tommc: Hello.  What is the easiest way to output the current file name at expansion time? Extracting the source-path from some dummy syntax?
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00:37 dyoo: tommc: define-runtime-path does something like this in using variable-reference->resolved-module-path
00:37 dyoo: tommc: https://github.com/plt/racket/blob/master/collects/racket/runtime-path.rkt
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00:40 dyoo: tommc: it might be easier to use this-expression-source-directory: http://docs.racket-lang.org/mzlib/mzlib_etc.html?q=this-expression-source-directory#(form._((lib._mzlib/etc..rkt)._this-expression-source-directory))
00:40 rudybot: http://tinyurl.com/czamc2u
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00:49 tommc: Thanks dyoo.  I ended up just using syntax-case and reading syntax-source.
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00:53 Diarmid: chandler: That "warp" command almost looks like a joke manpage.
00:54 Diarmid: chandler: I keep expecting the Rocky Horror people. :P
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02:00 eli: chandler: That sounds promising, but I can't figure out how to use that thing.
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03:49 merijn: Is there a swank implementation for Racket?
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04:39 hkBst: merijn: it's not that, but there is geiser
04:45 merijn: hkBst: Ah, but that's emacs. I was hoping for something to use with vim using SLIMV :\
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08:39 Sycamore: Hi, can anyone give me a hint on why this doesn't work:
08:39 Sycamore: [(apply-env X E) ,(let ([b (cdr (assq (term X) (term E)))])                       (apply-env (caar (term ,b)) (cdar (term ,b)))
08:39 Sycamore: under    (define-metafunction iswim-mach
08:40 Sycamore: [(apply-env V ()) (term V)                     (side-condition (eq? #f (redex-match iswim                                                           X                                                          (term V))))]
08:40 Sycamore: It says "apply-env: illegal use of syntax in: (apply-env (caar (term (unquote b))) (cdar (term (unquote b))))"
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10:20 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/X4T-4g
10:20 RacketCommitBot: [racket/master] added vector->list - Matthias Felleisen
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10:26 haffe: Hello. In the racket object system is there some way to make a specific function run when a class is initilized?
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11:01 asumu: haffe: sure, just call it in the class body.
11:02 asumu: rudybot: (define c% (class object% (super-new) (displayln "init")))
11:02 rudybot: asumu: your sandbox is ready
11:02 rudybot: asumu: Done.
11:02 asumu: rudybot: (new c%)
11:02 rudybot: asumu: ; Value: #(struct:object:c%)
11:02 rudybot: asumu: ; stdout: "init\n"
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11:51 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/JSoF3A
11:51 RacketCommitBot: [racket/master] Document relation between `Path-String' and `path-string?'. - Sam Tobin-Hochstadt
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12:28 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/FD77rw
12:28 RacketCommitBot: [racket/master] Revise `Path-String' wording. Thanks Robby. - Sam Tobin-Hochstadt
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13:16 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/Rk0G_g
13:16 RacketCommitBot: [racket/master] add hinting configuration to `font%' - Matthew Flatt
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13:21 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/JSBvFQ
13:21 RacketCommitBot: [racket/master] apply Andy's diff (and adjust the documentation correspondingly) - Robby Findler
13:21 RacketCommitBot: [racket/master] add 'match-pattern?' - Robby Findler
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14:31 danking: So, how should I go about parmeterizing a whole module over some values? Is this what units are for?
14:31 danking: I basically want a specialized set library that needs to know about some special equality predicates and join operations.
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14:31 danking: I'm not sure how to cleanly make this into a module.
14:32 stamourv: danking: Units sound reasonable.
14:32 stamourv: Also, parameters.
14:33 stamourv: Or possibly syntax parameters.
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14:43 Fare: what are parameters?
14:43 Fare: as in parameterize / cl special variables ?
14:43 samth: Fare: yes
14:43 samth: parameterize operates on parameters
14:44 Fare: sounds like a very dirty way of doing what danking wants
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14:46 stamourv: Fare: I'm not exactly sure what he wants.
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14:48 danking: stamourv, Fare: I'm pretty sure Units are what I'm looking for.
14:48 Fare: can I get a room at neu for a lisp meeting? In april? may? eli seems overworked - can someone else do it?
14:48 danking: Ideally, I'd like to do something like (require (instantiate-in my-awesome-sets special-equal special-join)), where special-equal and special-join are "arguments" to my module my-awesome-sets.
14:49 stamourv: danking: Sadly, using both units and modules is a bit heavyweight.
14:50 Fare: danking: in cl I use "interface passing style", which is like units w/o automatic currying, but w/ clos method combination.
14:50 stamourv: I like your idea, though, that would be great!
14:50 stamourv is not very subtle.
14:51 Fare: danking: so some require'rs get just one instance of one unit in a required module?
14:55 danking: hmm
14:59 danking: Fare: I'm not every familiar with common lisp, I'm not sure how something like "interface passing style" would look in Racket. Re: rooms for boston-lisp at NEU, I looked into doing that once and Eli told me not to bother because the bureaucracy is rather stiff and he had already infiltrated it.
14:59 danking: stamourv: Alright, I'll look into it and see if I can't macro-magic the heavyweight away...
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15:11 Fare: can you infiltrate the eli for me?
15:12 Fare: or duplicate his file handle to the bureaucracy?
15:12 Fare: because my handle on him seems stale
15:13 Fare: to use "interface passing style
15:13 Fare: in racket, you'd probably use swindle for method combination
15:13 (quit) jhemann: Ping timeout: 246 seconds
15:14 Fare: and then you'd add a unit-like syntax layer on top to do the currying
15:14 Fare: where applicable
15:15 stamourv: rudybot: (require racket/require)
15:15 rudybot: stamourv: your sandbox is ready
15:15 rudybot: stamourv: Done.
15:15 stamourv: rudybot: doc require-transformer
15:15 rudybot: stamourv: not found in any library's documentation: require-transformer
15:15 stamourv: rudybot: doc define-require-transformer
15:15 rudybot: stamourv: not found in any library's documentation: define-require-transformer
15:15 stamourv: danking: You may want to have a look at `racket/require'.
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15:16 stamourv: rudybot: doc make-require-transformer
15:16 rudybot: stamourv: no docs for a current binding, but provided by: racket/require-transform
15:17 stamourv: rudybot: (require racket/require-transform)
15:17 rudybot: stamourv: Done.
15:17 stamourv: rudybot: doc make-require-transformer
15:17 rudybot: stamourv: http://docs.racket-lang.org/reference/stxtrans.html#(def._((lib._racket%2Frequire-transform..rkt)._make-require-transformer))
15:17 stamourv: danking: ^, finally.
15:18 pauls: rudybot: Dance!
15:18 rudybot: pauls: eh?  Try "rudybot: help".
15:19 pauls: Ah, man. ) :
15:20 samth: chandler: have you ever run that `warp` script?
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15:27 asumu: danking: Units aren't too bad if you don't do much linking.
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15:28 asumu: rudybot: (define f (lambda (x) (unit (import) (export) (displayln x))))
15:28 rudybot: asumu: your sandbox is ready
15:28 rudybot: asumu: Done.
15:28 asumu: rudybot: (invoke-unit (f 5))
15:28 rudybot: asumu: ; stdout: "5\n"
15:29 asumu: In your case, it doesn't sound like you need to do any linking.
15:29 asumu: Unless you plan to use a signature containing the set parameters as an import.
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15:30 eli: Fare: Sorry, I tried getting to the person in charge a few times but she wasn't in.  I sent an email though.
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15:30 chandler: samth: Yes, I have. The ast-open stuff can be a bit of a pain to install.
15:30 samth: chandler: indeed
15:30 samth: my kingdom for a debian package
15:30 chandler: I think I had to be using ksh to make it work too.
15:31 chandler: http://www2.research.att.com/~gsf/download/gen/BINARY.html
15:31 chandler: It's a bit buried on the site, but that's pretty much the right magic to get it working.
15:31 samth: yeah, i've partly got it
15:31 samth: but it doesn't actually work
15:31 chandler: are you getting something like: ./warp: line 5: integer: command not found
15:31 chandler: ?
15:31 (quit) jhemann: Ping timeout: 260 seconds
15:32 chandler: or are you having trouble getting it downloaded?
15:32 samth: more like the former
15:33 samth: plus it hardcodes date being in /usr/bin/date
15:33 samth: but it's /bin/date
15:33 samth: plus it uses an outdated version of the date arguments
15:34 chandler: for the first part, either run the script with the ksh that's in the bin dir, or add #!/usr/bin/env ksh
15:34 chandler: I'm not seeing hardcoded /usr/bin/date in the script
15:34 chandler: it probably expects to work with the "date" that's included in ast-open, not your system date
15:36 chandler: after adding a shebang line to the script and putting $HOME/ast-open/bin:$HOME/ast-open/arch/linux.i386-64/bin in path, I can use the script
15:36 chandler: $ warp 2012-03-26/12:00:00 drracket
15:36 chandler: read-bitmap: expects type <path-string or input-port> as 1st argument, given: '#(#<procedure:draw-honu> 270 270); other arguments were: 'unknown/alpha #f #t
15:37 samth: did you have to change the ld_library_path?
15:37 chandler: no
15:38 samth: ok
15:41 samth: ok, i successfully see the turtle :)
15:41 samth: chandler: thanks a ton
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15:54 eli: samth: If you can produce exact instructions on how to run it, it will help in avoiding C-level hacking.
15:54 samth: eli: working on
15:54 samth: it
15:55 samth: unfortunately, the ast-open stuff is the worst-packaged software ever created
15:57 eli: samth: That was my initial reaction -- then I saw that there was a ton of work in that whole package thing, so my guess is that it's trying to emulate some other environment.
15:58 eli: Unsurprising, when coming from that place.
15:58 samth: it's an impressive amount of work, but it's still terrible
15:58 samth: and it requires that you use their bin/date, and their ksh
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16:06 jon7_: anyone know where to get wasysym.sty? i get an error about it when running scribble --pdf
16:08 bremner: jon7_: afaik, it is included with texlive (on linux-ish platforms)
16:08 jon7_: yea.. it should be. i installed like 20 texlive packages and havent gotten the sty yet though
16:08 jon7_: i did fix some other error about a different missing sty
16:11 chandler: samth: I think you might be able to use the shared object it's preloading from your own wrapper to avoid a lot of this cruft.
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16:16 samth: jon7_: it's in texlive-fonts-recommended for me on ubuntu
16:16 jon7_: yea i just installed that one
16:17 jon7_: i got some wierd output from latex but it seems like scribble worked
16:18 chandler: samth: try something like this: $ WARP=-86400 LD_PRELOAD=/home/brian/ast-open/arch/linux.i386-64/lib/libwarp.so.1.0 drracket
16:18 chandler: (erk, ignore the $ there)
16:18 chandler: the value of WARP is just the offset from the current time in seconds
16:19 samth: chandler: well done!
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16:25 chandler: The last time I messed around with this ast-open stuff was when trying to build the real ksh, and it was a mess then. It doesn't look like it's changed since then.
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16:38 samth: chandler: i've now got it working quite nicely, mostly thanks to you
16:39 chandler: Glad I could help.
16:42 jhemann_: I'd like to get, somehow, the location of an event *within* a snip. Say, for instance I'm clicking on the third item. Does the on-event method not provide a way to get that information? If not, how would one go about getting that?
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17:58 asumu: jhemann: "To get event’s x location in snip coordinates, subtract x from (send event get-x)." from the reference on snips.
17:58 asumu: That sounds like what you want, if I understand correctly. (from docs for on-event)
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19:00 (topic) samth: Racket -- http://racket-lang.org -- logs at http://racket-lang.org/irc-logs/
19:01 samth is pretty sure it's now tomorrow everywhere
19:03 samth: anyone here have a mac with drracket handy?
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19:19 jamessan: samth: I could install it on a mac
19:19 samth: jamessan, not that important
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20:15 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/wsiPew
20:15 RacketCommitBot: [racket/master] scribble: for Latex/PDF output, use \makebox for precise pict widths - Matthew Flatt
20:15 RacketCommitBot: [racket/master] racket/draw: add `get-handle' to `bitmap%'; add `make-handle-brush' - Matthew Flatt
20:15 (part) RacketCommitBot
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20:20 tommc: samth: Still need a mac tester?
20:21 racfster: rudybot: shen the
20:21 rudybot: racfster: Shen does use a semi-free license apparently, though Mr Tarver finds the GPL too restrictive and the BSD license too anarchic
20:21 racfster: rudybot: shen the
20:21 rudybot: racfster: This Shen has inner beauty inside, belive me!
20:21 racfster: rudybot: shen the
20:21 rudybot: racfster: ,shen is an optionally-typed functional lisp dialect that is the successor to qi: http://www.lambdassociates.org/shen.htm
20:21 racfster: rudybot: shen the
20:21 rudybot: racfster: ok, everyone, discussion of shen is now over
20:21 rudybot: I am so bored talking about shen
20:21 racfster: rudybot: shen the
20:21 rudybot: racfster: SHEN RULES!!!!!!!!!!!!!!!!!!
20:21 rudybot: I hope racfster tires of poking me
20:22 racfster: hey, you improved rudybot!
20:22 racfster: :)
20:22 rudybot glares at racfster
20:22 racfster: amazing!
20:22 rudybot: We didn't need voices -- we had faces!
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20:26 racfster: it's nice to have once again hear "the sound of silence" typical for this channel :)
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20:26 racfster: i really don't understand why i disturb you when here is mainly silence
20:27 rudybot: PLEASE BE QUIET!
20:27 rudybot: .oO ("this is the worst hangover evar")
20:28 racfster: rudybot: (define (shen-is-beter) "yeah it really is!")
20:28 rudybot: racfster: your sandbox is ready
20:28 rudybot: racfster: Done.
20:28 racfster: rudybot: (shen-is-beter)
20:28 rudybot: racfster: ; Value: "yeah it really is!"
20:28 offby1: also I'm afraid if you talk about shen you'll attract ... The Troll
20:28 offby1: who I don't _think_ is you.
20:28 bremner: seriously??
20:28 racfster: hi, offby1
20:29 offby1 lives in fear of trolls
20:29 bremner: I notice racfster is not being an ass in #shen
20:29 racfster: please, don't have fear of me
20:29 racfster: i'm benign
20:29 offby1 trembles tremblingly
20:30 racfster: what is custodian in racket?
20:31 tommc: racfster: They manage resources; threads, file, tcp ports etc.
20:32 racfster: for what i should use it?
20:32 tommc: racfster: You clearly like Shen. Why not implement it in Racket?
20:32 racfster: it's already done by someone else
20:33 racfster: for a few days it will bi published
20:33 tommc: racfster: Look at the More tutorial, there's a good 'interactive' example there.
20:33 racfster: for now, there are versions for clojure, lisp and javascript
20:34 offby1: I am not sure I've ever used a custodian
20:34 racfster: neither I, but saw it is mentioned in documentation
20:36 racfster: i cannot believe that someone took the effort to make rudybot more sensible on me, hehehehe
20:36 offby1: that would be me
20:37 racfster: ???
20:38 offby1: !!!
20:39 (nick) rudybot -> bot22
20:39 racfster: Why do I disturbing you so much that you ban me, change rudybot, etc?
20:39 (nick) bot22 -> rudybot
20:40 offby1: I don't ban anyone!
20:40 offby1: (not from this channel anyway)
20:40 racfster: ok, maybe you don't, but...
20:40 tommc: racfster: Are you racketnoob?
20:40 racfster: of course I am!
20:41 (quit) Nisstyre: Ping timeout: 246 seconds
20:42 tommc: Thought as much.  I think some of your comments on racket are useful, but personal attacks never get you far.  I suspect that's why they ban you.
20:42 tommc: ... and for spamming Shen.
20:42 racfster: but every attack is in some way personal
20:43 racfster: and I must attack because if i don't, racket doc will always sucks!
20:43 racfster: :)
20:44 tommc: There are attacks that effect change, and those that are ignored.
20:44 racfster: mine is always igored :(
20:45 bremner: racfster: that's because the punch-in-face-over-IRC protocol is not widely deployed
20:45 tommc: Then change your delivery.
20:45 racfster: no metther that MAJORITY of users thinks for example that web docs sucks
20:46 racfster: at first, i was polite, on racket user group
20:46 racfster: but then...
20:46 racfster: ...I encountered a wall of misunderstanding
20:47 asumu: racfster: your first e-mail concerning the documentation was this: http://lists.racket-lang.org/users/archive/2011-December/049632.html
20:47 asumu: Do you consider it polite?
20:47 racfster: and only then I was pissed off
20:48 racfster: but that was on purpose
20:48 racfster: ok, i was a little rude
20:48 racfster: but not too much
20:49 racfster: my only interest here is not to insult people, but to push some pressure for better doc
20:49 tommc: Aside from being a little rude (It's especially hard to be rude when you're not paying someone), it's not specific enough for a person to help.
20:50 tommc: If you say:  I wish to accomplish X, but cannot understand the documentation.  Then you'll probably get a good solution to X, and the surrounding documentation might be improved.
20:51 racfster: look, there are good reasons why for example clojure is so popular, despite the fact that it appeared much later than racket
20:51 racfster: and the key is: excelent documentation
20:52 racfster: rich hikey is not too busy writting academic "artificial" articles all the time
20:53 racfster: instead of that, there are at least 5 good book on clojure
20:53 bremner: so if every other system is better, why are you here?
20:53 racfster: and 0 on racket (not counting HtDP, for begginers only)
20:53 racfster: bremner, good question
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20:54 racfster: i'm here because, paradoxally, i like racket"!
20:54 tommc: racfster: I think Clojure's biggest strong point is being able to interface with the JVM, and existing libraries.  It's a "safer" choice.
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20:54 racfster: maybe, but i think it's something else
20:55 racfster: rich hickey puts effort on promoting clojure,  not on writing "artifical" articles
20:56 bremner: ok, that's enough feeding the troll for me. Good night.
20:56 racfster: bremner, i'm not the troll
20:56 racfster: seriously
20:56 racfster: i'm benevolent
20:57 racfster: there are no malice in me
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20:58 tommc: What exactly do you think is missing? More tutorial style docs?
20:58 racfster: for beginnning, 1 good, systematic book on racket
20:58 danl_ndi: sometimes people won't get that I'm just trying to help them. why won't people let me help them? must be them, not me...
20:59 racfster: a book like a forecoming "Book of Shen"
20:59 racfster: or like PragProg's book on clojure
21:00 chandler: you know, I think all your complaining about the racket documentation could fill a book by now
21:00 racfster: if i know english better maybe i coud write it
21:00 racfster: but now i cant
21:01 racfster: i'm quick lerner of programming languages, but sadly i'm unable to learn english for some reason
21:02 tommc: racfster: That's your editor's problem :)
21:04 racfster: but here's another reason why I can't write a Racket book: how possible could i write web part of book if I don't understand "official" doc at all?
21:05 tommc: I'm sure the experts on the list could help you with specific queries.
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21:06 racfster: I'm sure too, but i don't like to ask in my broken english, i just want to read and understand what i'm reading
21:07 racfster: it's hard for me to express myself in english but it's much easyer just to read english text
21:08 racfster: you know, i'm ADHD person
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21:13 racfster: on the one hand God gave you, on the other takes
21:14 ssbr_: tommc: you asked earlier what someone thought could be improved
21:14 ssbr_: as a nontroll response, I've very often accidentally found myself in the reference docs when I should have been directed to the narrative / intro docs
21:14 ssbr_: and I didn't notice until many years later
21:15 asumu: ssbr_: was this a search issue or an issue in how the docs page is laid out or...?
21:16 ssbr_: asumu: issue is that they come up earlier in google search (you can't control), and it wasn't obvious when I got there that I was in the wrong place
21:16 (quit) jeapostrophe: Ping timeout: 260 seconds
21:17 ssbr_: anyway yeah, the reference docs are very hard to read :S
21:17 tommc: ssbr_: I was enquiring, but I'm just a mere user.  Sounds like a good suggestion though.
21:17 ssbr_: especially as an undergraduate student learning racket for a course
21:17 racfster: ssbr, you need good book
21:17 asumu: ssbr_: I see. That's a good point. Not all reference pages link to the corresponding guide page. Though some do.
21:17 racfster: but you can't buy it
21:18 danl_ndi has found the racket docs page search to be extremely useful.
21:18 racfster: because there aren't any
21:18 ssbr_: asumu: I only noticed because I started seeing the guide links. I don't know if those were always there or if I just missed them
21:18 ssbr_: racfster: I'm not a fan of paper books
21:18 ssbr_: well, I know I missed them, but for how long?
21:19 racfster: it's not important is it paper or electronic, it's sistemacity that metters
21:19 (quit) dented42: Read error: Connection reset by peer
21:19 racfster: and book are much better for learning then any doc
21:19 racfster: any ad hoc doc
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21:19 ssbr_: Not really important to me.
21:19 ssbr_: Also there is a guide. Is that guide not systematic enough?
21:19 racfster: guide do not cover all
21:20 racfster: only certain aspects
21:20 asumu: ssbr_: So this is an interesting tension, but the reference, for example, says at the top that the guide is a "friendlier" intro. You think this reminder is needed on every page?
21:20 asumu: (that could be done for every section header at least)
21:21 racfster: it's missing something importatnt: the broader context when you shoud use something mentioned in documentation
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21:23 racfster: "When an extension allocates resources that must be explicitly freed (in the same way that a port must be explicitly closed), a Racket object associated with the resource should be placed into the management of the current custodian with scheme_add_managed."
21:24 racfster: is there anyone that understands above?
21:24 racfster: extension? what extension?
21:24 ssbr_: asumu: I find myself usually at the top of some part way into the reference, because I googled, say, how to use match
21:24 (quit) tommc: Remote host closed the connection
21:24 ssbr_: asumu: if I were just learning match, and saw it in tutorial without understanding, the reference is pretty opaque stuff
21:25 (join) tommc
21:25 racfster: it's the excpert from here: http://docs.racket-lang.org/inside/Custodians.html?q=custodian
21:25 ssbr_: asumu: http://docs.racket-lang.org/reference/match.html vs http://docs.racket-lang.org/guide/match.html
21:26 tommc: racfster: That's the C API, is that what you need?
21:26 racfster: no, custodian
21:27 racfster: oh right
21:27 tommc: http://docs.racket-lang.org/reference/eval-model.html?q=custodian&q=custodian#(tech._custodian)
21:27 rudybot: http://tinyurl.com/c8obfjh
21:27 asumu: ssbr_: that example has a link to the guide though.
21:28 asumu: I agree that the guide is far more useful to a beginner. Do you think there's a better way to make the guide entry more obvious?
21:28 tommc: asumu: Tagging GUIDE / REFERENCE on search results might be a good idea.
21:29 racfster: asumu, have you ever read any book from charles petzold?
21:29 tommc: scratch that... it's already done.
21:29 racfster: those are books!
21:29 ssbr_: asumu: the example has a link to the guide in the far right where nobody would read, in a way that is distinguishable from the main content (which it is assumed people mean to read)
21:29 ssbr_: asumu: at the least, if people were directed from google, it should be made more obvious (yay referer)
21:29 ssbr_: basically it's placed the same way ads are, and nobody reads ads
21:30 racfster: in any case, thank you for a conversation. good night!
21:30 (quit) dous: Remote host closed the connection
21:31 ssbr_: goodnight sir
21:31 (quit) racfster: 
21:31 ssbr_: asumu: the only objection I can think of offhand to the guide is that it, for all its examples, never actually tells you how to write your own. I guess it's assumed that you'll move on to the reference entry (which is difficult to read)
21:33 ssbr_: asumu: but I'm not good to say what would trouble a beginner or not, because I'm no longer a beginner. This is just what I remember troubling me when I was.
21:33 asumu: ssbr_: Fair enough, I suppose people might ignore that margin note. Would it help if it was in the prose at the top?
21:33 ssbr_: In fact, when I learned about match and (non-prolog [non-unification]) pattern matching, last year, I never actually saw the guide page
21:33 ssbr_: I always looked at the reference page, which was very frustrating.
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21:33 ssbr_: I don't know if the guide link was around back then though
21:33 (quit) realitygrill: Remote host closed the connection
21:33 ssbr_: asumu: I think so, yes
21:33 ssbr_: (A B testing might help verify)
21:34 (quit) yoklov: Quit: computer sleeping
21:34 asumu: Okay. Well, adding prose linking guide and ref entries doesn't seem too hard. I'll bring it up with our doc tzar.
21:36 ssbr_: asumu: dank u!
21:36 asumu: s/tzar/czar/
21:37 ssbr_: both valid spellings
21:37 (join) yoklov
21:37 asumu: Oh, good for me then.
21:37 ssbr_: "Tsar", "Tzar", "Csar", and "Czar"
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23:21 (join) MrWells
23:21 MrWells: Hello!
23:22 MrWells: 1. Is anyone actually here? 2. Anyone willing to help me with some minor issues
23:23 (quit) yoklov: Quit: computer sleeping
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23:23 MrWells: hey
23:24 MrWells: ANYYYYONNNNEEEE HOOOOMME?
23:25 MrWells: like seriously, am I doing it wrong or is no one actually here
23:27 offby1: nobody here but us zombie processes.
23:27 MrWells: ah
23:27 offby1: we're not always staring at our screens, y'know
23:28 MrWells: yeah but with like 40-50 people i would expect at least one to be currently typing
23:28 offby1: *shrug*
23:28 MrWells: sorry though
23:28 rudybot is usually around
23:28 offby1: rudybot: yes, but you're an idiot
23:28 rudybot: *offby1: yeah we only train idiot terrorists
23:29 MrWells: would it be intrusive/n00bish of me to ask questions on why I am getting errors? Im not sure if my professors code is wrong or I am making a mistake.
23:29 offby1: go ahaid
23:30 MrWells: so we are learning how to use 'cons', the example he gives is "(cons 1 ())", but It tells me that is expecting a funtion inside those parens and so it doesnt do anything
23:31 offby1: yep, either the prof is wrong or you're using the wrong version of schee
23:31 offby1: scheme
23:31 MrWells: im using the 'Advanced Student' language that is availible from the menu
23:31 offby1: hmm
23:31 offby1: I never use those ...
23:31 offby1: certainly what you wrote is an error in normal racket:
23:31 MrWells: Well thats the one he told us to use for the last project. If it is different for this one, he has not told us
23:31 offby1: rudybot: (cons 1 ())
23:31 rudybot: *offby1: error: #<undefined>:1:8: #%app: missing procedure expression; probably originally (), which is an illegal empty application in: (#%app)
23:31 offby1: I had trouble typing that since my fingers knew it was wrong!
23:31 offby1: here's how I'd do it:
23:31 offby1: rudybot: (cons 1 '())
23:31 rudybot: *offby1: ; Value: (1)
23:32 offby1: note the quote mark
23:32 MrWells: thats what I thought... but I was browsing random Scheme code an one example on wikipedia hjad a () in it
23:32 offby1: now, it's possible that your 'Advanced Student' doesn't require the quote mark
23:33 offby1: Nope. I get the same error as you
23:33 offby1: just throw in a quote mark as needed and ask your prof when you next see him/her/it
23:34 MrWells: well the thing is our professor does this all the time. Normall it is a small error, easy to fix... but this time there are so many that I cant finish the lab... also its not with a language that I've had much experiance with like it usually is
23:35 offby1: shame that there isn't a free market in professors :)
23:35 MrWells: two more errors if I may? If it is nothing obvious for you guys, no big deal.
23:36 offby1: sure sure
23:37 MrWells: it says 'second argument must be a list' to "(cons 1 2)" so should I do (cons (list 1 2))?
23:38 offby1: that's one way
23:38 offby1: let's see
23:38 offby1: rudybot: (cons (list 1 2))
23:38 rudybot: *offby1: error: cons: expects 2 arguments, given 1: '(1 2)
23:38 offby1: hmm!
23:38 offby1: I guess not :)
23:38 offby1: what else might we try?
23:39 offby1: here, I'll stretch your brain a bit:
23:39 offby1: rudybot: (cons 1 2)
23:39 rudybot: *offby1: ; Value: (1 . 2)
23:39 offby1: rudybot: (cons 1 (list 2))
23:39 rudybot: *offby1: ; Value: (1 2)
23:39 offby1 rubs chin
23:39 offby1: rudybot: (cons 1 (cons 2 ' ()))
23:39 rudybot: *offby1: ; Value: (1 2)
23:39 MrWells: ah! rudybot: (cons 1 (list 2)) works..
23:40 MrWells: i think that is what he wanted when he said (cons 1 2)
23:40 MrWells: as we were doing lists just before that part of the lab
23:46 MrWells: ok
23:46 MrWells: thanks
23:46 MrWells: last bit. Hopefully
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23:46 MrWells: (define (print-rat rat) (newline) (display (numer rat)) (display “/”) (display (denom rat)))
23:47 MrWells: define: expected only one expression for the function body, but found 2 extra parts for "(display (numer rat))"
23:47 MrWells: so should I be seperating numer and rat?
23:47 MrWells: rat is for rational number
23:50 MrWells: i dont need numer do i? as I earlier stated "(define (numer rat)(car rat))" in the program
23:51 MrWells: nvm. still gives me the same error for "(newline) (display rat)"
23:51 asumu: MrWells: That error is telling you that your function body has too many things.
23:52 asumu: Functions should only have a single expression.
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23:52 asumu: (in BSL/ISL/ASL)
23:53 MrWells: Well iom very new to Scheme, and trying to interpret code from my professor, that is either wrong, or that I am not understanding some part of
23:53 MrWells: using one expression makes sense
23:53 MrWells: still not sure exactly where im telling it to use two... or how to fix it
23:55 asumu: MrWells: You should probably read this chapter http://www.htdp.org/2003-09-26/Book/curriculum-Z-H-43.html
23:55 asumu: Especially 35.2
23:55 MrWells: Thank you!
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