You can add this repository to get a more recent version *ppa:plt/racket*
*https://launchpad.net/~plt/+archive/ubuntu/racket <https://launchpad.net/~plt/+archive/ubuntu/racket>* On Sat, Oct 4, 2014 at 4:16 PM, Andrew Ulrich <andrewsotheracco...@gmail.com > wrote: > That was the problem, thanks Robby! I guess ubuntu's apt repo's not up to > date or something. > > Andrew > > On Sat, Oct 4, 2014 at 2:38 PM, Robby Findler <ro...@eecs.northwestern.edu > > wrote: > >> Are you sure you have a recent version of racket? I wonder if you're >> looking at the docs for the latest release (on docs.racket-lang.org) >> but you have an older release where you're trying things out. >> >> Note that you can look at your local docs and those docs should match >> up to your local installation. >> >> Robby >> >> >> On Sat, Oct 4, 2014 at 2:32 PM, Andrew Ulrich >> <andrewsotheracco...@gmail.com> wrote: >> > Ok, I'm stuck again: >> > I'm trying to use place-image, but it keeps saying >> > place-images: unbound identifier in module in: place-images >> > >> > It doesn't even seem to work with the example code in the docs found at: >> > >> http://docs.racket-lang.org/teachpack/2htdpimage.html?q=overlay#%28def._%28%28lib._2htdp%2Fimage..rkt%29._place-images%29%29 >> > >> > Here's what I think the docs say the code is: >> > #lang racket >> > (require 2htdp/universe) >> > (require 2htdp/image) >> > (require lang/posn) >> > (place-images >> > (list (circle 4 "solid" "blue") >> > (circle 4 "solid" "white") >> > (circle 4 "solid" "white") >> > (circle 4 "solid" "white")) >> > (list (make-posn 18 20) >> > (make-posn 0 6) >> > (make-posn 14 2) >> > (make-posn 8 14)) >> > (rectangle 24 24 "solid" "goldenrod")) >> > >> > But like I said, I get the error. I'm trying to use place-images to >> place a >> > bunch of sprite images on a scene for a simple video game. I'm assuming >> > place-images the best way to do that. >> > >> > Thanks in advance for helping me out. I know it's basic stuff. >> > >> > On Sat, Oct 4, 2014 at 9:04 AM, Andrew Ulrich >> > <andrewsotheracco...@gmail.com> wrote: >> >> >> >> Aha, great! Thanks guys! >> >> >> >> Andrew >> >> >> >> On Sat, Oct 4, 2014 at 8:54 AM, Jens Axel Søgaard < >> jensa...@soegaard.net> >> >> wrote: >> >>> >> >>> Hi Andrew, >> >>> >> >>> To add what Matthias say, if you need a "function version" of bitmap, >> >>> you can use bitmap/file instead. >> >>> >> >>> (require 2htdp/image) >> >>> (define path-stringy "images/some.png") >> >>> (bitmap/file path-stringy) >> >>> >> >>> Note that I changed (path-stringy) to path-stringy. >> >>> >> >>> /Jens Axel >> >>> >> >>> >> >>> >> >>> >> >>> 2014-10-04 15:48 GMT+02:00 Matthias Felleisen <matth...@ccs.neu.edu>: >> >>> > >> >>> > What you used is called a "computed string" that is, you expect >> bitmap >> >>> > to evaluate the argument path-stringy to a string. >> >>> > >> >>> > But, in BSL, bitmap expects to be handed a literal string constant >> (or >> >>> > a module path): >> >>> > >> >>> > >> --------------------------------------------------------------------- >> >>> > (require 2htdp/image) >> >>> > >> >>> > ;; with a module path >> >>> > (bitmap 2htdp/planetcute/character-cat-girl.png) >> >>> > >> >>> > ;; with a fixed string >> >>> > (bitmap >> >>> > >> "plt/pkgs/htdp-pkgs/htdp-lib/2htdp/planetcute/character-cat-girl.png") >> >>> > >> --------------------------------------------------------------------- >> >>> > >> >>> > Both of these will succeed and retrieve the cat girl from the Planet >> >>> > Cute collection that comes with Racket -- Matthias >> >>> > >> >>> > >> >>> > >> >>> > >> >>> > On Oct 4, 2014, at 9:36 AM, Andrew Ulrich wrote: >> >>> > >> >>> >> Hi, I've got a really simple problem, I think. Why is it that >> when I >> >>> >> try to do the following: >> >>> >> >> >>> >> (require 2htdp/image) >> >>> >> (define path-stringy "images/some.png") >> >>> >> (bitmap (path-stringy)) >> >>> >> >> >>> >> I get the following error: >> >>> >> bitmap: expected the argument to specify a local path (via a >> string) >> >>> >> or a module path (e.g. `icons/b-run.png') in: (bitmap >> (path-stringy)) >> >>> >> >> >>> >> I mean, shouldn't path-stringy evaluate to a string before it's >> passed >> >>> >> into bitmap? If not, then how do I use bitmap for anything >> dynamic? >> >>> >> >> >>> >> Thanks, >> >>> >> Andrew >> >>> >> ____________________ >> >>> >> Racket Users list: >> >>> >> http://lists.racket-lang.org/users >> >>> > >> >>> > >> >>> > ____________________ >> >>> > Racket Users list: >> >>> > http://lists.racket-lang.org/users >> >>> >> >>> >> >>> >> >>> -- >> >>> -- >> >>> Jens Axel Søgaard >> >> >> >> >> > >> > >> > ____________________ >> > Racket Users list: >> > http://lists.racket-lang.org/users >> > >> > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > >
____________________ Racket Users list: http://lists.racket-lang.org/users
